Gửi bàigửi bởi admin » Thứ 6 Tháng 5 29, 2020 7:17 am

I. Pre- and post-meal blood glucose disturbance 2
1. Safe blood glucose level for the heart and nervous system 2
2. Blood glucose for digestion 2
II. Cases of blood glucose disturbances 3
1. Blood glucose greater than 200 mg/dL or 11.1 mmol/L (4 cases) 3
2. Blood glucose less than 140 mg/dL or 7.8 mmol/L 4
3. Blood glucose less than 100 mg/dL or 5.6 mmol/L 4
4. Impaired glucose absorption 5
5. Lipid metabolism disorders 5
III. Treatment experiences with QiQong Therapy/Complementary Medicine 6
1. Theory 6
2. Practice 7
IV. Reflections on the Covid-19 case 13

I. Pre- and post-meal blood glucose disturbance
1. Safe blood glucose level for the heart and nervous system
The heart and nervous system are functioning 24 hours a day. The diet must be able to provide 180 g of glucose daily, of which 36 g for the heart and 144 g for the nervous system. For the proper functioning of the heart and nervous system, blood sugar levels should be:
before meals: 100-140 mg/dL or 6-8 mmol/L
after meals: 140-200 mg/dL or 8-11 mmol/L

However, medical practice declares diabetic any person with a blood glucose level above 126 mg/dL or 7 mmol/L, this renders almost the entire population diabetic.

According to QiQongThérapie, a branch of Complementary Medicine, blood glucose levels are adequate when the following values are present, depending on the age group:


The American Heart Association recommends the daily amount of glucose:
Women: 6 teaspoons/day; in 3 intakes: in the morning, noon and evening
Men: 9 teaspoons/day; in 3 intakes: in the morning, noon and evening

This is the amount needed at all times for the proper functioning of the heart, the pre-meal blood glucose level 100-140 mg/dL or 6-8 mmol/L (or 5.6-7.8 mmol/L).

2. Blood glucose for digestion
After a meal, there should be a surplus of 40-60 mg/dL so that the stomach can digest and convert the food into energy and blood to nourish all the cells. For this reason, blood glucose after meals should be 140-200 mg/dL or 8-11 mmol/L, according to the World Health Organization (WHO) in the year 1979. Excess glucose would be stored in the liver as glycogen up to 100 g, the remaining would be stored as fat in the body. If there is a shortage of glucose, the glucose in reserve would be taken from the liver glycogen first, then from the body fat. The continual lack of glucose will lead to weight loss, premature aging, diseases...Sugar from food is used to nourish, to ensure cellular functions and to renew cells. The blood glucose level after a meal of 200 mg/dL, will decrease on average by 10 mg/dL/hour, to return to the pre-meal blood glucose level of 140 mg/dL or 8 mmol/L, 5 to 6 hours later.
Keeping the blood glucose level always below 126 mg/dL or 7 mmol/L is the cause of blood glucose, cardiovascular and nervous system disturbances, arterial tension, etc., requiring the use of more and more varied medications.

II. Cases of blood glucose disturbances
Measuring blood pressure, blood sugar levels, temperature, before meals and 30 minutes after meals, allows to detect any disturbance in blood sugar levels. At all times, before or after a meal, hyper or hypotension, good blood sugar levels allow to have a pulse of 70 to 80 bpm, and a temperature of 36.1oC to 36.9oC, on the little finger on the left.

1. Blood glucose greater than 200 mg/dL or 11.1 mmol/L (4 cases)
a. Case 1: If the pulse and temperature are within the reference values of 70-80 bpm and 36oC and above, then the blood glucose of 200 mg/dL is normal; there is no diabetes.

b. Case 2: If the pulse is between 80-90 bpm (above the reference of 70-80 bpm), and the temperature is 37oC (above the reference), then hyperglycemia will raise blood pressure and body temperature.

c. Case 3: if the pulse is between 90-110 bpm (higher than reference), and the temperature is 35oC or LO (lower than reference), then it is not the true blood glucose value, but an apparent blood glucose value; due to lack of blood, the sugar concentration becomes higher. The following example shows why the pulse is high when there is a lack of blood. A job has to be done by 10 people, there are only 5 people left, these people have to work faster to finish on time the same job done by 10 people.

e. Case 4: if the pulse is 60-65 bpm, thus lower than the reference, and the temperature is LO, it does mean that the stomach is cold and does not digest the food. Undigested food will overload the stomach, causing high blood pressure. The high blood sugar would therefore come from the sugar taken from the body, not from the food. A can of Pepsi should be drunk to lower blood pressure and blood sugar. Pepsi lowers blood pressure, and the sugar in Pepsi helps digestion. Otherwise, this person would mistakenly take 2 types of medications: antihypertensive and anti-diabetic drugs which will degrade health, leading to myocardial infarction or renal filtratrion. The cause is only the lack of glucose to complete digestion.

Master's Anecdote: I have always consumed a lot of glucose for about 40 years, without being diabetic. My values always remain within the reference limits:
130-140 mmHg/ 70-85 mmHg /70-80 bpm; temperature 36-36.5oC on the little finger on the left, blood sugar after meals 370 mg/dL to drop to 102 mg/dL after 2 hours of work, or activities...

It is the drug lowering sugar that causes disturbances of blood sugar levels, indigestion, kidney failure, nervous system disorder...The heart needs 36 g of glucose per day, and the nervous system needs 144 g of glucose per day. It is the medical practice, not taking into account the results of medical research, that requires the use of many drugs.

2. Blood glucose less than 140 mg/dL or 7.8 mmol/L
a. Before meal If the person has all the values within the reference limits, then the blood glucose is correct and comes from food. Ex: a person between 41 and 59 years old has the following values:
systolic: 120-130 mmHg
diastolic: 70-80 mmHg
pulse: 70-75 bpm
temperature: 36-36.5oC

On the other hand, if the tensions and temperature remain lower than those of the age-referenced values, then this glycemia would come from sugars taken from the body, fats, muscles, bones...Ex:
systolic <100 mmHg
diastolic<65 mmHg
pulse <65 bpm

The cause is avoidance of sugar, poor diet, diagnosis of diabetes...Medication to keep blood sugar always below 126 mg/dL or 7 mmol/L will lead to cardio-cerebral vascular accidents by obstruction, lack of blood, or death during sleep by a drastic drop in blood sugar.

b. After meal. After a meal, the blood glucose level could rise to 200 mg/dL or 11 mmol/L. A blood glucose level of less than 140 mg/dL or 8 mmol/L indicates a lack of glucose for digestion. Undigested food overloads the stomach, will ferment, give off gas and increase blood pressure, without supplying sugar to the body, will further lower the pulse and body temperature. To maintain the safe functioning of the heart and nervous system, the body will draw sugar from different parts of the body (liver, fats, muscles, bones...) giving yawning and drowsiness after meals. A medication for diabetes and blood pressure, will increasingly lower the pulse and body temperature, promoting the densification of fats in the blood, leading to stroke (Cerebral Accident / Cardio Vascular) by obstruction. Under the pretext of disease prevention, a variety of drugs will be produced and strongly suggested to the population, by scientists and industrialists.

3. Blood glucose less than 100 mg/dL or 5.6 mmol/L
a. Before meal. The cause is the lack of fundamental and functional sugar for the heart, brain and digestion, which is the case of the majority of the population. Everybody boasts that they do not have diabetes, hypertension...without knowing that cancer is incubating, giving signs of weight loss and premature aging. Weakness, general tiredness, body pain, dizziness, lack of appetite, nocturnal urination...are signs of low blood sugar.

b. After a meal. This is the case of a person who does not eat or eats poorly. There is not enough glucose for digestion, indigestion causes blood pressure to rise. There would be heart failure due to lack of glucose, narrowing of tendons, muscles, nerves, cancer of the stomach, lungs, large intestine ...

c. Before going to sleep. This is the case of a person who goes to sleep after dinner. Sugar and undigested food remains in the stomach. The next day, standing upright causes sugar to flow to the small intestine, raising the blood glucose to 140 mg/dL or 8 mmol/L. People who take anti-diabetic drugs before bedtime to lower blood glucose to 100 mg/dL or 6 mmol/L are at risk of falling into a fatal hypoglycemic coma because during sleep, blood glucose continues to drop below 60 mg/dL or about 4 mmol/L.

4. Impaired glucose absorption
This is the name given to situations where there is a random variation in blood glucose levels. The cause comes from the drop in blood glucose levels that determine diabetes, and the theoretical references of safe blood glucose levels established for diabetics, according to the American Diabetes Association.
Before meals: 90-130 mg/dL or 5-7.2 mmol/L
One to two hours after meals: less than 180 mg/dL or 10 mmol/L
Before bedtime: 110-150 mg/dL or 6-8.3 mmol/L

Blood glucose levels normally vary according to the needs of the body. During sleep, energy re-distribution will continue to consume sugar, which could lower blood glucose levels towards the threshold of paralysis: 60-65 mg/dL or less than 60 mg/dL, the threshold for a fatal hypoglycemic coma.

HbA1C values indicate the amount of sugar fixed to the red blood cells when blood glucose levels exceed 180 mg/dL or 10 mmol/L. Since red blood cells are renewed every 3 months, then these values, obtained every 3 months, are misleading in the determination of diabetes. If a person exceeded 180 mg/dL on a single day during the 3 month period, the test result will diagnose that person as a diabetic. Another person often exceeded 180 mg/dL during the last week of the 3-month period, the analysis at the beginning of the next 3-month period will not detect anything, because the red blood cells have already renewed themselves.

5. Lipid metabolism disorders
It is the low glycemia lower than 100 mg/dL or 6 mmol/L which does not provide enough heat, energy, glucose to feed the brain, the heart, to digest food ... affects the metabolism of lipids and uric acid.

- Triglycerides and very low density lipoprotein (VLDL) increase in cases of obesity.
- The increase in triglycerides is accompanied by a decrease in good cholesterol or high density lipoprotein (HDL)
- As lipoproteins increase, the liver produces more VLDL
- Blood cholesterol has little effect on obesity
- The increase in cholesterol is often followed by an increase in the bad low density lipoprotein (LDL).
- Blood uric acid increases with increasing triglycerides. A sudden rise in uric acid leads to gout.

III. Treatment experiences with QiQong Therapy/Complementary Medicine
1. Theory
a. Blood glucose 140-150mg/dL or 8-8.5 mmol/L before bedtime
A person suffers from night sweating followed by fatigue, lack of appetite. After 2 weeks of hospitalization, no illness was detected. The obvious cause is that the person has low blood sugar, but it is the drop in blood sugar that determines diabetes, which makes the person's blood sugar normal. Reference used: 70-125 mg/dL.

Night sweating, according to Eastern Medicine, is due to a lack of Yang to keep the Yin. Nocturnal sweating causes blood loss. In this case, raising the blood glucose level to 180 mg/dL or 10 mmol/L before bedtime will complete the night sweating and urination, while ensuring good quality of sleep. One teaspoon of glucose raises blood glucose by 10 mg/dL.

b. Blood glucose less than 100 mg/dL before bedtime
The person could die during sleep if the blood glucose drops below 50 mg/dL, because sugar continues to be used to maintain body functions.
Ex.: at bedtime, blood sugar 120 mg/dL, the next day when getting up, blood sugar 70 mg/dL, this blood sugar level could only cause discomfort, dizziness...

c. Constant change in blood glucose levels
Blood glucose levels are constantly changing as a result of activity during the day. A blood glucose level of 200 mg/dL in the morning may drop to 120 mg/dL in the afternoon. Seeing high blood glucose levels means that a person avoids sugar during the day. Assuming that the blood glucose level is stable, the person is treated for high blood glucose in the late evening. Any mode of treatment, by medication or exercise...without measuring the tension in both arms, the blood sugar level, the temperature, could be fatal, because the blood sugar level of 120 mg/dL will be lowered to 80 mg/dL with signs of cardiac fatigue, dizziness...

2. Practice
Case 1. The drop in blood glucose levels that determines diabetes causes a disturbance in blood glucose levels. 4 hours after a meal, the blood glucose level drops to the pre-meal level. The insulin has transported all the sugars into the cells. The possible disturbance is that the pre-meal blood glucose level is high and becomes low after a meal.

Case 2. Pre-meal high blood glucose 150 mg/dL; post-meal decrease to 120 mg/dL; then increase to 160 mg/dL

High pre-meal blood glucose levels indicate that there is still undigested food in the stomach from the previous meal. To digest the food, practice the exercise "Pull knees to chest while blowing” slowly.

Two people have the same after-meal blood glucose level of 180 mg/dL.
- the person a, has exercised or engaged in activities; 4 hours later, the blood sugar level drops, the insulin has transported the sugar into the cells
- on the other hand, the person b, is resting, without any activity; the sugar remains in the blood and does not lower the glycemia.

Blood sugar drops after the next meal
- Person a: has his meal containing acidic flavours, bitter cucumbers...which lower blood sugar levels.
- Person b: the food from the next meal pushes the food and sugar from the previous meal into the intestine, insulin carries the sugar to the cells, thus lowering blood sugar levels.

If the blood sugar is high before eating, practice one of the following two exercises:
- Melts abdominal fat, lowers blood sugar without insulin, and restores renal filtration. ...

Slowly pull the knees to the chest while blowing, to metabolize sugar and digest food.

If blood glucose is low after a meal, drink glucose to raise blood glucose to 140-180 mg/dL or 8-10 mmol/L and then perform the above exercises.

Case 3. Unchanged pre- and post-meal blood glucose 120 mg/dL or 7 mmol/L
Drink 4 teaspoons of glucose to raise blood glucose to 160 mg/dL and practice "Pull knees to chest while blowing" to digest food.

A diet of brown rice with sesame seeds lowers blood pressure and blood glucose. The pulse is low, blood circulation is slowed down, blood is cold, easily densifies and creates occlusions giving pain to the obstructed areas. According to Oriental Medicine: Any obstruction to blood and energy circulation causes pain. Lack of glucose cools the blood, and predisposes to obstructions.

Treatment: Drink glucose to raise blood glucose to the after meal level (200 mg/dL), increase pulse, increase body heat, increase blood circulation speed, then practice "Clap the hands in 4 steps" to bring circulation to the arms, head, neck...and "Heel forward and backward" to bring circulation to the legs. The pain will dissipate.

Cortisone temporarily reduces the pain, but could induce osteoporosis and kidney failure. Cortisone does not increase the heartbeat or body heat, and it lowers the body's sugar, so the pain comes back all the time.

Case 4. Blood glucose: 120 mg/dL (7 mmol/L) at bedtime, and 160mg/dL (9 mmol/L) the next morning
The cause is due to the accumulation of undigested food in the stomach.
a. Reverse processing. Tension in the left arm is higher than in the right arm before eating. This case leads to esophageal reflux, cysts of the neck, ranging from gas, fat, benign and malignant cysts.
b. Incomplete digestion of food. The transformation is normal, i.e. the tension in the left arm is lower than in the right arm, before meal, but due to lack of glucose, the digestion is incomplete. The difference in the tension in the left and right arms after a meal indicates the % of food digestion. Ex:

- Left: 140 mmHg; right: 130 mmHg
A difference of 10 in height means 100% digestion

- Left: 130 mmHg; right: 125 mmHg
A difference of 5 in height means 50% digestion

Denivelation: 1-2-3-4-5...digestion at 10%-20%-30%-40%-50%...accomplished.

After a meal, blood glucose should increase to 200 mg/d L (11 mmol/L) to aid digestion. Ex.: to grind 5 kg of rice into flour, 5 litres of petrol are required, but only 3 litres are available, so 3 kg will be ground and 2 kg will remain in the machine.

The blood glucose level of 200 mg/dL (11 mmol/L) will drop to 100 mg/dL (6 mmol/L) at the next meal. Western Medicine does not have blood glucose after meals, calls the situation of blood glucose disturbance. Avoiding sugar induces stomach disease.
- If the blood sugar level in the morning is lower than the blood sugar level before bedtime of the previous night, then the transformation is good.
- If the blood sugar level in the morning is higher than the blood sugar level before going to bed the night before, then the undigested food remains in the stomach during the night. It is necessary to drink 4 teaspoons of glucose and practice "Pull the knees to chest while blowing" to digest the food.

Case 5. The heart needs 6 to 9 teaspoons of glucose per day to function.
In case of lack of sugar, the body will draw sugar from the liver, fats, muscles, bones...leading to the breakdown of the body.
NB: Sugar in a bowl of rice gives only 40 mg/dL. The heart needs, at all times, 150 mg/dL or 7 mmol/L.

Case 6. Before meal, 100-140mg/dL (6-8 mmol/L); after meal, 370-400mg/dL (around 20-21 mmol/L), temperature 37.5oC, body does not lack sugar
If the blood sugar level is high and the temperature is 36.5-37.5oC, this is normal. A temperature of 38oC indicates an excess of sugar, then practice "Melt Abdominal Fat" to lower blood sugar and regenerate kidney filtration. The higher the blood sugar level, the more perspiration when exercising, the more pink the complexion will be, the better the memory will be. ...

Case 7. Amputation of limbs, kidney filtrations
Blood glucose: 200-500 mg/dL is higher than the reference value, before and after meals, low body temperature, cold limbs. People who do not consume sugar, receive in addition insulin injections, but blood glucose does not drop. The whole body is starved for sugar, insulin injections gradually destroy the body. To compensate for the insulin, the body has to draw sugars from all parts of the body: muscles, bones, marrow...until the body dies. The adrenal capsules can no longer regulate blood pressure and blood sugar levels, the kidneys stop working, so kidney filtration is necessary.

Case 8. Compulsory exercises?
There has never been a policy of imposing, more or less, exercises on anyone. The goal is to use exercise to re-balance energy, blood, blood sugar levels in order to maintain an overall balance in the body. Each person has a different amount of time to practice in order to obtain the desired result. You must always use a blood pressure monitor, a glucometer and a thermometer to know and follow the progress of the treatments.
Before practicing, raise blood glucose to 180-200 mg/dL (10-11 mmol/L).
During the practice, if there is tiredness, sweating, must stop and measure your blood sugar level, and retake glucose if necessary, to continue practicing.
At the end of the practice, re-measure and make sure that the blood glucose level does not drop below 140mg/dL (8 mmol/L). Do not forget that the heart needs 36 g of glucose and the brain needs 144 g of glucose per day without fail.

Case 9. Disturbance of blood glucose levels following the replacement of glucose by honey or sweet dishes
Drinking 3 teaspoons of glusose is worth more than a sweet dish containing 10 spoons of sugar. The 3 spoonfuls of glucose will pass directly into the bloodstream, whereas the sugar from the sweet dish must pass through the stomach before entering the bloodstream.

Drinking 3 teaspoons of glucose will immediately dissipate cardiac fatigue, dizziness, feed the brain...whereas the sweet dish only raises blood sugar levels a few hours later, without removing the discomfort.
Honey does not raise blood sugar, does not provide heat, does not dissipate the above mentioned discomforts. Glucose is compatible with coffee, but not honey.

Case 10. There is no type 1 diabetes
According to Western medicine:
Only insulin lowers blood sugar.
Type 1 diabetes is the absence of insulin production, injection of insulin with blood glucose >140 mg/dL (8 mmol/L)
Type 2 diabetes is the insufficient production of insulin; medication required
Physical exercise lowers blood sugar levels

If exercise lowers blood sugar, why use medication?
The pancreas produces insulin from dietary protein into proinsulin, which is converted into insulin when needed.

The physical exercises of QiQongTherapy induce the conversion of proinsulin into functional insulin.
Too much exercise, without glucose replenishment, will increase too much insulin, which will lower blood sugar too much, in the long run, leading to glucose deficiency leading to cell death, limb amputation, blindness.

Case 11. Glycosuria is not diabetes
Glycosuria is the presence of glucose in the urine, it is a sign of the proper functioning of the kidneys that eliminate any excess of sugars (if the person urinates on the ground in a field, the urine will attract ants. If the person urinates in the toilet bowl, bubbles will form on the surface of the water in the bowl). High blood glucose without glycosuria indicates diabetes.

Case 12. Persistent dizziness even with consumption of glucose
Anecdote of Master Đỗ Đức Ngọc

A person, without being diabetic, often suffers from vertigo, even if the person takes glucose regularly. The blood glucose is 80 mg/dL around 5 mmol/L, I gave her 6 teaspoons of glucose, asked her to turn her head quickly to the right and left...she doesn't feel dizzy. I advised her to buy a glucometer to monitor her blood glucose levels, because even if she took glucose at random, she would still get dizzy if her blood glucose remained below 100 mg/dL. The glucose meter will tell you when it is appropriate to drink glucose.
Without a glucometer, turn your head quickly to the right and left, if there is nothing, the blood glucose level is good, if there is vertigo, take 3 teaspoons of glucose right away.

Case 13. Facial paralysis
According to 2010 references, a blood glucose level above 126 mg/dL or 7 mmol/L indicates diabetes. Anyone under these references are more likely to have facial paralysis. Low blood glucose results in slow blood flow, which may become denser and clog blood vessels. Finger blood glucose is 120 mg/dL (7 mmol/L), on the face 100 mg/dl (6 mmol/L).

Treatment: Drink glucose to raise blood glucose to 180 mg/dL (10 mmol/L), paralysis subsides from 145 mg/dL, but returns as soon as blood glucose drops.
Below 100 mg/dL (6 mmol/L), any exposure to cold air, or overexertion, may result in facial paralysis.

Case 14. Convulsions or Epileptic seizures
Low blood pressure 110/60 mmHg, low pulse rate 65 bpm, low blood sugar 90 mg/dL leads to low irigation of the head causing contractions of the neck, the head...several seizures a day will hurt the heart, the brain. If more severe, there is rigid retraction of the fingers of the hands.

Treatment: Drink glucose to raise blood sugar to 180 mg/dL (10 mmol/L), scratch the head to bring blood to the head, weigh on the acupuncture point Nhân Trung/ 26 RM renzhong, located under the nose in the upper third of the nasal fold, to maintain oxygen to the brain, the epileptic will resuscitate.

Eat beef soup (phỡ), drink glucose to raise the blood sugar to 180 mg/dL, and never let the blood sugar drop below 100 mg/dL (6 mmol/L), there would be no more seizures.
Case 15. Diabetes in pregnancy
Anecdote: thanks to Master
My family is against taking sugar, I am afraid of abortion in the second pregnancy, I followed your advice to drink glucose, to recite the CompassionMantra (Chú Đại Bi). I had a well-formed, strong and healthy child. My sincere thanks to you.

Case 16. Coma and facial paralysis
Anecdote from the Master, a story from a person whose father is hospitalized urgently in Viet Nam
- Person: Master, why does my father go to the toilet and urinate too often?
- Master: It is due to the lack of glucose
- Person: I gave my father glucose to drink, there is a lot of improvement. There are many such cases in the hospital, this practice could help them. Thank you very much Master
- The person: Last night, my father had a seizure, called out the names of those already dead in the family and said they wanted to drag me in with them...
- The Master: Drink a lot of glucose and recite the Compassion Mantra (Chú Đại Bi) to raise the Yang energy, the body heat will keep away the spirits.
- The person: I gave my dad 12 teaspoons of glucose, he's not having seizures anymore.
- The person: The doctors said the blood flow to the brain is gradually receding, the reason my dad is talking nonsense is because of the brain damage...

I have helped many such cases in the hospital, these people are very happy with the good result, thanks to your method, Master. I am fortunate to have your teachings, drink glucose and weigh on acupuncture points, which many doctors don't know, they have the diploma but not the knowledge. My father's blood sugar went up to 9.2 mmol/L, blood pressure left: 117/67mmHg/74 bpm, right: 94/62mmHg/81 bpm
I always treated my father in secret, family members only believe in doctors, but not in the glucose theory. My father's fate is thus left to the care of the treating doctors.

Case 17. Danger: blood glucose less than 70-90 mg/dL(<5 mmol/L)
It is the blood sugar that leads to vegetative life. The person is cold to the body, has an acidic pH, often falls into a coma, has nightmares, makes incoherent statements, lacks cellular oxygen predisposing to cancers, is easily possessed by one to several minds at the same time .

Treatment: Drink plenty of glucose to raise the pulse, body heat, pH to pH 7-8 (alkaline), to avoid possession by spirits. Nowadays in the USA there are many centers to take care of these cases of vegetative life until death, called House care.

IV. Reflections on the Covid-19 case
Western Medicine has two aspects, one oriented towards experimental research to understand and find solutions to problems, the other, rather practical and financial. Knowing that glucose is necessary for the body to produce antibodies, the practice has pronounced the evils of sugar for too long, continues to avoid sugar as usual. As a result, the body is still less and less equipped with glucose to fight the pandemic.
Site Admin
Bài viết: 6126
Ngày tham gia: Chủ nhật Tháng 4 17, 2011 12:18 am

Quay về Commenting on the subject Qigongrememo (KCYĐ)

Ai đang trực tuyến?

Đang xem chuyên mục này: Không có thành viên nào đang trực tuyến2 khách