On November 3, the construction company's arrival meeting for the "four electricity" project of the Anhui section of the Shanghai Nanjing Hefei high-speed railway and the Chihuang high-speed railway was held in Tunxi, Anhui, at the construction site of the Chihuang high-speed railway, marking the official commencement of the construction of the "four electricity" project of the two projects.

The "Four Electricity" Project of Anhui Section of Shanghai Nanjing Hefei High speed Railway will build 352.48 kilometers of catenary, 9 traction post pavilions, 1 10KV power distribution substation, 28 base stations, 6 relay stations, build 1 10KV power distribution substation, and transform 1 10KV power distribution substation. The "four electricity" project of Chihuang High speed Railway will build 315.26 kilometers of catenary, 9 new traction post pavilions, 2 10KV power distribution posts, 20 base stations and 7 relay stations.

The traction power supply system of the Anhui Section of Shanghai Nanjing Hefei High speed Railway and the "Four Electrics" Project of Chihuang High speed Railway adopt the power supply mode of autotransformer (AT). The external power supply voltage level of the traction substation adopts 220 kV. The catenary adopts fully compensated elastic chain suspension. The through line adopts the full cable laying mode. OTN backbone layer transmission system, GSM-R digital mobile communication system and integrated video monitoring system based on cloud architecture are newly established for communication. The train dispatching command system adopts the intelligent centralized dispatching (CTC) system.

The Shanghai Nanjing Hefei high-speed railway is an important part of the Shanghai Chongqing Chengdu high-speed railway. The east end of Anhui section connects Nanjing City, Jiangsu Province, and runs westward through Chuzhou City to Hefei South Railway Station, the hub of Hefei. The newly built main line is about 103 kilometers long, with a design speed of 350 kilometers per hour. Chuzhou, Dashu and Feidong stations are set along the whole line, of which Dashu Station is a new station, and Chuzhou and Feidong are reconstruction and expansion stations.

Chizhou Huangshan High speed Railway is an important part of Wuhan Hangzhou High speed Railway. The line is from Chizhou Station to Huangshan North Station. The new main line is about 125 kilometers long and the design speed is 350 kilometers per hour. Five stations are set along the whole line, including Chizhou Station, Jiuhuashan Station, Huangshan West Station, Yixian East Station and Huangshan North Station. Taiping Lake Bridge is a control project along the whole line. After the project is completed and opened to traffic, it will become a golden tourist route connecting two mountains and one lake (Jiuhua Mountain, Huangshan Mountain and Taiping Lake) in southern Anhui.

The high-speed railway construction is generally divided into pre station works and post station works. The pre station works mainly include subgrade, bridge, tunnel and track works. The post station works mainly include the "four electricity" works of housing construction and communication, signal, electric power and electric traction power supply. The "four electricity" works are the "central brain" and power source of the whole high-speed railway, and also the key link in the high-speed railway construction.