The Shanghai-Kunming line - 2,252 km in length - traverses five provinces of Zhejiang, Jiangxi, Hunan, Guizhou and Yunnan, and cuts the travel time from Shanghai to Kunming, capital city of Yunnan Province, from 34 to 11 hours, according to China Railway Corporation.
The maximum speed is 330 km per hour, said Wang Jingda, a train driver.
The Shanghai-Kunming line is the longest east to west high-speed railway in China. The north to south 2,298-km Beijing-Guangzhou line is even longer and started in 2012.
China has built more than 20,000 km of high-speed rail lines. The mileage will increase to 45,000 km by 2030.
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