According to the regulations of the Aviation Administration, liquid, gel and spray drugs, including traditional Chinese medicine, can be exempted as long as they are accompanied by a doctor's prescription or a hospital certificate. The quantity of medicine depends on the needs of passengers on the plane, and containers and plastic bags are not needed.

If you buy over-the-counter Chinese patent medicines in pharmacies, such as liquid medicine in containers with a capacity of no more than 100 ml and liquid medicine in transparent plastic bags with a capacity of no more than one liter, you can pass the safety inspection.