Inbound and outbound passengers must accept health quarantine inspections by frontier quarantine services if so requested. Persons carrying such objects as microorganisms, tissues from the human body, biological products, blood, or blood products cannot enter or exit unless they apply to a health quarantine service and accept required quarantine inspections. Persons who enter or leave China carrying, or consigning shipment luggage or objects that may cause the spread of contagious disease are obliged to treat or destroy such articles as foodstuffs, drinks, and aquatic products if they are contaminated by contagious diseases.
Persons arriving from areas infested with yellow fever must present certificates of inoculation against yellow fever to the quarantine department when entering China. Any person not having the above mentioned certificate will be detained for observation until the sixth day after leaving the infested area, or such person may be inoculated and detained until the time when the inoculation is deemed effective.
Health quarantine services are obliged by law to prevent any foreigner suffering from AIDS, venereal disease, leprosy, mental illness, or active tuberculosis from entering China.(cytsonline.com)