Yang Longming writes a diary of his COVID-19 volunteer experience at the Meihuali community in Hexi District of Tianjin, north China, June 1, 2020. Since Feb. 18, Yang Longming, a procuratorate staff member, has worked as a COVID-19 prevention and control volunteer in Tianjin's Meihuali community for more than 100 days. The 32-year-old has been keeping a diary of his COVID-19 volunteer experience. Although Yang served temporarily and mostly worked overnight, he feels rewarded for what he has done especially when he received appreciation from community residents. (Xinhua/Li Ran)

Yang Longming is pictured while on duty at the Meihuali community in Hexi District of Tianjin, north China, June 1, 2020. Since Feb. 18, Yang Longming, a procuratorate staff member, has worked as a COVID-19 prevention and control volunteer in Tianjin's Meihuali community for more than 100 days. The 32-year-old has been keeping a diary of his COVID-19 volunteer experience. Although Yang served temporarily and mostly worked overnight, he feels rewarded for what he has done especially when he received appreciation from community residents. (Xinhua/Li Ran)

Yang Longming hands out protective face masks to residents of the Meihuali community in Hexi District of Tianjin, north China, June 1, 2020. Since Feb. 18, Yang Longming, a procuratorate staff member, has worked as a COVID-19 prevention and control volunteer in Tianjin's Meihuali community for more than 100 days. The 32-year-old has been keeping a diary of his COVID-19 volunteer experience. Although Yang served temporarily and mostly worked overnight, he feels rewarded for what he has done especially when he received appreciation from community residents. (Xinhua/Li Ran)

Yang Longming rearranges shared bikes outside the Meihuali community in Hexi District of Tianjin, north China, June 1, 2020. Since Feb. 18, Yang Longming, a procuratorate staff member, has worked as a COVID-19 prevention and control volunteer in Tianjin's Meihuali community for more than 100 days. The 32-year-old has been keeping a diary of his COVID-19 volunteer experience. Although Yang served temporarily and mostly worked overnight, he feels rewarded for what he has done especially when he received appreciation from community residents. (Xinhua/Li Ran)

Yang Longming measures a resident's body temperature at the Meihuali community in Hexi District of Tianjin, north China, June 1, 2020. Since Feb. 18, Yang Longming, a procuratorate staff member, has worked as a COVID-19 prevention and control volunteer in Tianjin's Meihuali community for more than 100 days. The 32-year-old has been keeping a diary of his COVID-19 volunteer experience. Although Yang served temporarily and mostly worked overnight, he feels rewarded for what he has done especially when he received appreciation from community residents. (Xinhua/Li Ran)

Yang Longming is pictured while on duty at the Meihuali community in Hexi District of Tianjin, north China, June 1, 2020. Since Feb. 18, Yang Longming, a procuratorate staff member, has worked as a COVID-19 prevention and control volunteer in Tianjin's Meihuali community for more than 100 days. The 32-year-old has been keeping a diary of his COVID-19 volunteer experience. Although Yang served temporarily and mostly worked overnight, he feels rewarded for what he has done especially when he received appreciation from community residents. (Xinhua/Li Ran)