Effective from 30MAY2022, with the announcement from China CAA, all passengers traveling between Taiwan and Mainland China (not including Hong Kong, Macau) are required to present the record of negative PCR test report which is taken twice within 48 hours. However, it is highly recommended to have the reasonable time intervals of the first taken between the second taken. (How to calculate the validity of PCR test report: The report time must be less than 48 hours prior to flight STD.