Entries from 2017-12-06 to 1 day
First circular line in Chengdu opened as the trial operation. "Wisest Brain" http://www.chinanews.com/m/cj/2017/12-04/8391884.shtml(Summary of the article) 9 o'clock on December 6th, Chengdu Metro Line 7 began trial operation officially. T…