A police officer introduces a mobile service platform to passengers at Chengdu East Railway station, in Chengdu, capital of southwest China's Sichuan Province, Feb. 1, 2018. The 2018 Spring Festival travel rush, known as the Chunyun, started on Thursday and will last till March 12. About 2.98 billion trips are expected to be made during the Chunyun. The Spring Festival, or Chinese Lunar New Year, falls on Feb. 16 this year. (Xinhua/Xue Yubin)