Qian Yaping, a tourist from central China's Hubei Province, puts a postcard into a mail box of the post office themed "Holy Mountains and Lakes" at the foot of Mount Kangrinboqe in Pulan County of Ali Prefecture, southwest China's Tibet Autonomous Region, July 25, 2019. This post office provides tourists with various services including theme stamps, cultural and creative products, Tibetan specialties and tourist souvenirs. (Xinhua/Jigme Dorje)