A crew member does railway maintenance work at the maintenance station in Jinshan North Station of Shanghai Railway Bureau Group in east China's Shanghai, Jan. 30, 2019. The recent Spring Festival travel rush will witnesses a surge in passenger flow, as the Lunar New Year gets closer and closer. Crew members in this station work carefully to secure the Spring Festival travel rush. (Photos: Xinhua)

Crew members have railway maintenance work at the maintenance station in Jinshan North Station of Shanghai Railway Bureau Group in east China's Shanghai, Jan. 30, 2019. The recent Spring Festival travel rush will witnesses a surge in passenger flow, as the Lunar New Year gets closer and closer. Crew members in this station work carefully to secure the Spring Festival travel rush.

Crew members do railway maintenance work at the maintenance station in Jinshan North Station of Shanghai Railway Bureau Group in east China's Shanghai, Jan. 30, 2019. The recent Spring Festival travel rush will witnesses a surge in passenger flow, as the Lunar New Year gets closer and closer. Crew members in this station work carefully to secure the Spring Festival travel rush.

A crew member does railway maintenance work at the maintenance station in Jinshan North Station of Shanghai Railway Bureau Group in east China's Shanghai, Jan. 30, 2019. The recent Spring Festival travel rush will witnesses a surge in passenger flow, as the Lunar New Year gets closer and closer. Crew members in this station work carefully to secure the Spring Festival travel rush.

Zhang Wenzhong does railway maintenance work with his colleague at the maintenance station in Jinshan North Station of Shanghai Railway Bureau Group in east China's Shanghai, Jan. 30, 2019. The recent Spring Festival travel rush will witnesses a surge in passenger flow, as the Lunar New Year gets closer and closer. Crew members in this station work carefully to secure the Spring Festival travel rush.