The shenzhen-zhongshan corridor is a world-class "bridge, island, tunnel and underground interworking" cluster project under construction worldwide. The shenzhen-zhongshan passage connects shenzhen and zhongshan, with a total length of 24 kilometers. The whole line adopts the standard construction of two-way eight-lane expressway, and the designed speed is 100 kilometers per hour.

   On the morning of March 10, the much-concerned construction of xiamen metro line 2 ushered in another key node -- the control section of the entire line of nodal project "haicang avenue station - dongdu station" cross-sea tunnel section was fully completed, marking that the entire line of rail paving into the undersea tunnel operations. The tunnel, designed by the fourth academy of China railway construction and constructed by the 14th bureau of China railway construction, is the first and most technically difficult shield tunnel to cross the seabed in China.

On the morning of January 17, with the cutter head of No. 3 Shield Machine moving slowly out of the tunnel, the shield machine on the right line of the line from Shengjin Tower Station to Liuyanjing Station of Nanchang Metro Line 3 has been successfully received, which marks the smooth connection of the first shield tunnel running through the main urban area of Nanchang Metro Line 3.

At 19:16 on January 25, along the left line of Juhua Station to East Bus Station in the fifth construction area of the second phase of Kunming Rail Transit Line 6, the cutter head of Hairuike Earth Pressure Balanced Shield Machine burst out slowly, marking the completion of the first 1155m long shield tunnel in the second phase of Kunming Rail Transit Line 6 in 2019.

There is new news about the construction of Nanjing metro: the third phase of EIA of Metro Line 6 and 3 has been approved. Nanjing Eco-environment Bureau has recently officially approved the environmental assessment of Line 3, Phase 3 and Line 6.

Recently, the Left-Line shield machine of Nanning Metro Line 5 from Wuyi Interchange Station to Xinxiu Park Station (hereinafter referred to as "Wuxin Section") started smoothly at the end of the major mileage of Wuyi Interchange Station. Nanning Metro will pass another line after Line 2 through Yongjiang River. There are 65 houses under the influence of the construction of the section, of which 27 buildings are crossing, which are the most buildings in the construction history of Nanning Metro.