Sophia Chan, secretary for food and health of the Hong Kong Special Administrative Region (HKSAR) government, addresses a ceremony to welcome the arrival of the mainland nucleic acid testing team at Metropark Hotel Kowloon in Hong Kong, south China, Sept. 3, 2020. Another 117 members of the mainland nucleic acid testing team arrived in Hong Kong Thursday for the Universal Community Testing Program (UCTP) that started on Sept. 1, bringing the total number of the team members to 427. (Xinhua/Wang Shen)