Luo Jinwu takes a throat swab sample from a resident for nucleic acid testing in Yangping Village of Yongding District in Zhangjiajie City, central China's Hunan Province, Aug. 12, 2021.Photo:Xinhua

Luo Jinwu walks to offer door-to-door nucleic acid sampling services in Yangping Village of Yongding District in Zhangjiajie City, central China's Hunan Province, Aug. 12, 2021.Photo:Xinhua

Xiang Ka walks to distribute medicines to patients at the Zhangjiajie Hospital of Traditional Chinese Medicine in Zhangjiajie City, central China's Hunan Province, Aug. 13, 2021.Photo:Xinhua

Luo Jinwu takes a throat swab sample from a resident for nucleic acid testing in Yangping Village of Yongding District in Zhangjiajie City, central China's Hunan Province, Aug. 12, 2021.Photo:Xinhua

Xiang Ka chats with his husband Luo Jinwu via video link at the Zhangjiajie Hospital of Traditional Chinese Medicine in Zhangjiajie City, central China's Hunan Province, Aug. 13, 2021.Photo:Xinhua

Luo Jinwu walks to offer door-to-door nucleic acid sampling services in Yangping Village of Yongding District in Zhangjiajie City, central China's Hunan Province, Aug. 12, 2021.Photo:Xinhua

Xiang Ka (R) is on duty at the Zhangjiajie Hospital of Traditional Chinese Medicine in Zhangjiajie City, central China's Hunan Province, Aug. 13, 2021.Photo:Xinhua

Xiang Ka tells a patient the directions on taking medicine at the Zhangjiajie Hospital of Traditional Chinese Medicine in Zhangjiajie City, central China's Hunan Province, Aug. 13, 2021.Photo:Xinhua