On January 6, 2021, Tianjin TEDA Urban Rail Investment Development Co., Ltd. issued an announcement that the first phase of the Tianjin Rail Transit Z4 Line project will start bidding. The construction period will be 4 years and the total investment will be 31.799 billion yuan.

The first phase project of Tianjin Rail Transit Z4 Line starts from the north of Jinjin Expressway in the south and to the north of Yingcheng Street Station in the north. The length of the line is 43.7 kilometers, of which the underground section is about 17.4 kilometers, the elevated section is about 24.9 kilometers, and the open section is about 0.9 kilometers long. Km, the roadbed section is about 0.5 km; there are 24 stations on the whole line, with an average distance of about 1.8 km, including 12 underground stations, 11 elevated stations, and 1 ground station; each of the Xincheng parking lot and the Hangu depot will be set up; Set up 1 Beitang Transportation Management Center; Huanggang Control Center (shared with B1 and Z2); Yujiabao (shared); transfer node (implemented simultaneously with B3 and Z2); set up a parking lot main transformer ( Long-term construction), Fifth Avenue Main Transformer, Yusha Road Main Transformer; the vehicles are A-type vehicles, with 4 moving 2 towing 6 vehicles in the initial, short and long term. The maximum operating speed is 120 km/h, and the DC 1500 is adopted. The catenary is energized.

For bidders whose bids are confirmed, please start from January 4th, 2021 to January 8th, 2021 (except for statutory holidays and statutory holidays, if there are changes to be notified separately), from 08:00 to 12:00 every day , From 13:00 to 16:00 (Beijing time), with a copy of the business license (copy with official seal), enterprise qualification certificate (copy with official seal) and letter of introduction to the unit, go to Tianjin Economic Technology No. 8 on the second floor of Zone C, No. 41, Fifth Avenue, Development Zone. Submit documents before 16:00 on January 8, 2021. Editor/Peng Xue