The commissioning and testing of the line started on 13 September 2019, and it started operations on 30 December 2019.[2]
References
^"新建大同至张家口铁路客运专线环境影响报告书" [Environmental Impact Report of the Newly Established Datong-Zhangjiakou Passenger Dedicated Railway Line] (PDF) (in Chinese). 铁三院. May 2015. Archived from the original(PDF) on 11 October 2016. Retrieved 17 June 2020.
^"大同到北京100分钟!大张高铁联调联试全面展开。" [100 minutes from Datong to Beijing! The large-scale high-speed rail joint commissioning trial is in full] (in Chinese). 高铁网-山西公共频道. 14 September 2019. Retrieved 17 June 2020.