Bullet trains ready for Spring Festival travel rush春运列车

Bullet trains undergo maintenance in Hefei, East China's Anhui province, Jan 31, 2018, before the Spring Festival travel rush between Feb 1 and March 12.

Bullet trains undergo maintenance before the Spring Festival travel rush in Hefei, East China's Anhui province, Jan 31, 2018. The station will handle 46 units of high-speed trains and prepare temporary trains for the holiday period.

Bullet trains undergo maintenance in Hefei, East China's Anhui province, Jan 31, 2018. High-speed trains have become a major part of the transportation system.

Bullet trains undergo maintenance in Hefei, East China's Anhui province, Jan 31, 2018. A high-speed train needs a comprehensive check after running 4,000 kilometers or 48 hours.

Bullet trains undergo maintenance in Hefei, East China's Anhui province, Jan 31, 2018. A worker Li Ming said that it takes about two hours to check a train with eight cars.