Passengers board a train at the Chongqing West Railway Station in Chongqing, southwest China, Feb. 12, 2018. The station witnessed the first travel peak of the Spring Festival travel rush on Monday. (Xinhua/Liu Chan)

Passengers walk on the platform of Chongqing West Railway Station in Chongqing, southwest China, Feb. 12, 2018. The station witnessed the first travel peak of the Spring Festival travel rush on Monday. (Xinhua/Liu Chan)

Passengers line up to board trains at the Chongqing West Railway Station in Chongqing, southwest China, Feb. 12, 2018. The station witnessed the first travel peak of the Spring Festival travel rush on Monday. (Xinhua/Liu Chan)

A father carrying his child heads to a high-speed train at the Chongqing West Railway Station in Chongqing, southwest China, Feb. 12, 2018. The station witnessed the first travel peak of the Spring Festival travel rush on Monday. (Xinhua/Liu Chan)

Passengers are seen at the waiting room of the Chongqing West Railway Station in Chongqing, southwest China, Feb. 12, 2018. The station witnessed the first travel peak of the Spring Festival travel rush on Monday. (Xinhua/Liu Chan)

Passengers wait for trains at the Chongqing West Railway Station in Chongqing, southwest China, Feb. 12, 2018. The station witnessed the first travel peak of the Spring Festival travel rush on Monday. (Xinhua/Liu Chan)

Passengers walk to the exit gate at the Chongqing West Railway Station in Chongqing, southwest China, Feb. 12, 2018. The station witnessed the first travel peak of the Spring Festival travel rush on Monday. (Xinhua/Liu Chan)