The Civil Aviation Administration of China (CAAC) posted on its website that passengers of China-bound flights must provide negative COVID-19 test results before boarding flights to China.
Nucleic acid tests must be completed within five days of embarkation. Facilities conducting tests in host countries must be designated or recognized by Chinese embassies in those countries.
Many countries are struggling with testing capacity and speed of producing results. Receipt of test results can take up to two weeks in some parts of the United States. In some countries, only people who have come in close contact with COVID-19 patients or who have symptoms of the disease are eligible for nucleic acid tests.
The CAAC has gradually allowed more foreign airlines to resume services in and to China. It has suspended several airlines from operating routes to China after more than five passengers tested COVID-19 positive upon arrival.