By the end of last year, China has 48,000 kilometers of high-speed rail out of total 162,000 kilometers railway network. According to the national railway operator, the country aims to expand its high-speed rail network to 60,000 km by 2030. What followed are a series of milestones in China's high-speed railway development.

Reviewer1:  Huang Mengyao

Reviewer2: Zhang Yanlan

Reviewer3:Tang Caihong

English Reviewer: Shen Fei