Japan implemented the same requirements for travelers from China’s mainland on Sunday.
Economic concerns, inflation ‘aren’t stopping people’.
Long queues formed at Hong Kong's international airport for flights to mainland cities including Beijing, Tianjin and Xiamen.
All health management measures upon entry into Macau will be scrapped.
The industry insider notes that current visitation from Hong Kong has reached a daily rate of between 2,000 and 3,000.
Some EU countries have already introduced testing - despite earlier advice that it was "unjustified".
Covid tests at the border will not be required for everybody, but travelers will have to provide proof of a negative PCR result obtained within 48 hours of their trip.
Australia and Canada this week joined a growing list of countries requiring travelers from China to take a COVID-19 test prior to boarding their flight.