Readers select books at a book store in Gaoxin District of Xi'an, capital of northwest China's Shaanxi Province, Jan. 14, 2019. Xi'an has been promoting public reading in recent years, with book stores increasing at a high speed. As of December 2018, the number of book retail outlets in Xi'an has nearly reached 2,000, more than doubled since the end of 2017. (Xinhua/Shao Rui)