Photo taken on May 6, 2019 shows the roof of Tianquan Pavilion at Humble Administrator's Garden in Suzhou, east China's Jiangsu province. In 1997, the classical gardens of Suzhou were put on the UNESCO's heritage list. In 2018, the total number of gardens included in the "Suzhou Garden List" reached 108, and Suzhou was officially transformed from "the City of Gardens" into "the City of 100 Gardens". (Xinhua/Li Bo)