Photo taken by cellphone on April 22, 2018 shows a slogan at a book hall in Hefei, capital of East China's Anhui province, April 22, 2018. In order to promote reading among its citizens, Hefei has built 29 "city reading spaces" in some locations such as parks, communities and business streets. About 100 "city reading spaces" are expected to be built here by 2020.[Photo/Xinhua]