Shanghai, Aug. 24 (xinhua) -- the first domestically made large-diameter mud and water balance shield machine "jiangpu" entered Shanghai on Aug. 24 and started its construction smoothly. This equipment is jointly developed by China railway construction heavy industry and Shanghai foundation company, and has completely independent intellectual property rights. The excavation diameter of the equipment reaches 11.63m, the total weight is about 1900t, and the installed power is 3661kW.

On the afternoon of August 21, the reporter learned from kunming railway company that the left line of shield tunnel between the north railway station and bailong road station was successfully completed yesterday. This marks the successful reception of the shield of the first deep buried overlapping tunnel of line 4, and the successful completion of the 58th single line section of line 4 project.

In the early morning of August 17, the 4615-meter shield tunnel of the left line from the intercity changlong to guangzhou south station was successfully completed. This is after this paragraph right line passes through another happy event. So far, 84 percent of the 16.68 shield tunnel construction has been completed.

On August 5, it was reported that the construction of kunming metro line 4 was speeding up again. The right line tunnel between xiaocaiyuan station of kunming rail transit line 4 and north railway station was successfully completed by China railway no. 5 bureau. Up to now, 57 of the 60 single lines of line 4 have been connected.