On Nov. 11 and 12,2018, an acceptance team composed of 6 experts from Beijing Rail Transit Construction Management Co., Ltd., Beijing Metro Operations Co., Ltd. Power Supply Branch, Academy of Railway Sciences (Beijing) Engineering Consult Co., Ltd., China Railway Electrification Survey and Design Research Institute Co., Ltd., and China Railway Second Bureau Group Electrical Engineering Co., Ltd., came to Tianan to accept the Second Phase Project of Beijing Rail Transit Line 7(Heizhuanghu station).