1. China nationals who have gone abroad 1 years or more must go to the International Travel Health Care Center (hereinafter referred to as the Health Care Center) affiliated to China Inspection and Quarantine Bureau before going abroad, and receive the International Travel Health Inspection Certificate (hereinafter referred to as the health certificate) after passing the physical examination. When leaving the country, you must show your health certificate to the China inspection and quarantine organ before leaving the country. Failing to go through the above procedures, the inspection and quarantine institution may, as appropriate, prevent them from leaving the country.
2. Domestic citizens who have lived abroad for more than three months must go to the nearest health center for health examination and obtain health certificates after entering the country.
3. Employees from China who work on public transport must go to the health center for health examination before departure, and receive health certificates after passing the health examination and proving that they are fit to work on international public transport.
Precautions for entering the United States:
1. No matter entering or leaving the United States, you can only carry containers with a capacity not exceeding 100 ml to hold liquids, gels and aerosols and put them in 1 liter bags.
2. It is forbidden to bring knives, animals and plants, seeds, food (meat) and fruits into the country.
If you bring more than $654.38 million in cash into the United States, you must declare it, otherwise it will be confiscated by the customs.
4. Please be sure to pay attention when checking luggage: certificates, air tickets, any kind of cash and valuables, and film must not be checked.
When entering or leaving the country, pay attention to your words and deeds, and don't talk nonsense about bombs and terrorism.