Workers of the China Railway No 4 Engineering Group lay the track of the Huzhou-Hangzhou high-speed railway in Yuhang district, Hangzhou city of East China's Zhejiang province, Dec 16. The construction of Huzhou-Hangzhou high-speed railway with designed speed of 350 kilometers per hour officially entered track-laying phase here Thursday. The line, which connects cities of Huzhou and Hangzhou, both in Zhejiang, is also a key auxiliary project to the 19th Asian Games Hangzhou 2022. [Photo/zjol.com.cn]

Aerial photo taken on Dec 16 shows workers of the China Railway No 4 Engineering Group lay the track of the Huzhou-Hangzhou high-speed railway. [Photo/zjol.com.cn]

Workers of the China Railway No 4 Engineering Group lay the track of the Huzhou-Hangzhou high-speed railway in Yuhang district, Hangzhou city of East China's Zhejiang province, Dec 16. [Photo/zjol.com.cn]