A technician examines the bullet train CRH 380A in Nanchang, capital of east China's Jiangxi Province, May 15, 2014. The Hangzhou-Nanchang-Changsha High Speed Railway will open to traffic this September. Two CRH 380A will be put into service on this route. (Xinhua/Zhou Mi)

A technician adjusts the seats in the bullet train CRH 380A in Nanchang, capital of east China's Jiangxi Province, May 15, 2014. The Hangzhou-Nanchang-Changsha High Speed Railway will open to traffic this September. Two CRH 380A will be put into service on this route. (Xinhua/Zhou Mi)

A technician examines the bullet train CRH 380A in Nanchang, capital of east China's Jiangxi Province, May 15, 2014. The Hangzhou-Nanchang-Changsha High Speed Railway will open to traffic this September. Two CRH 380A will be put into service on this route. (Xinhua/Zhou Mi)

Technicians examine the bullet train CRH 380A in Nanchang, capital of east China's Jiangxi Province, May 15, 2014. The Hangzhou-Nanchang-Changsha High Speed Railway will open to traffic this September. Two CRH 380A will be put into service on this route. (Xinhua/Zhou Mi)

Technicians examine the bullet train CRH 380A in Nanchang, capital of east China's Jiangxi Province, May 15, 2014. The Hangzhou-Nanchang-Changsha High Speed Railway will open to traffic this September. Two CRH 380A will be put into service on this route. (Xinhua/Zhou Mi)

A technician sorts out different tools before examining the bullet train CRH 380A in Nanchang, capital of east China's Jiangxi Province, May 15, 2014. The Hangzhou-Nanchang-Changsha High Speed Railway will open to traffic this September. Two CRH 380A will be put into service on this route. (Xinhua/Zhou Mi)