On the morning of May 21, 2023, the Hongqimen Bridge of Nanzhong Expressway, which was invested and constructed by China Railway Bridge Bureau of Guangzhou Communications Investment Group Co., Ltd., was closed. A bridge on the Pearl River Estuary that highlights green development once again spans the two cities of Guangzhou and Zhongshan, and the Guangdong-Hong Kong-Macao Greater Bay Press the "accelerator key" for regional interconnection.

The Nanzhong Expressway project is an important part of the National Highway G2518 and the Provincial Highway S78, and is a major transportation infrastructure project in the Guangdong-Hong Kong-Macao Greater Bay Area. The starting point of the main line of the project is connected to Nansha Port Expressway Xinken Interchange, and the end point is connected to Zhongjiang Expressway, which is connected to Xinlong Interchange of Guangzhou-Macao Expressway. The route is 21.6 kilometers long. The branch line of the project connects the main line and Shenzhen-Zhongshan Passage, and connects with Shenzhen-Zhongshan Passage at Wanqingsha Interchange , the route is 10.7 kilometers long.

The Hongqimen Bridge in Helong is one of the controlling projects of the South China Expressway project. The bridge has a total length of 1126 meters and a main span of 520 meters. The east and west towers are 178.5 meters and 176 meters high respectively. Beam cable-stayed bridge. The design of the bridge incorporates allegorical Lingnan cultural landscape elements. Its main tower is shaped like a kapok, light and lively, tall and beautiful, implying the meaning of moistening the bay area.

In the construction of the tower column, the project department has developed a prefabricated installation and construction technology of the entire section of the inclined tower steel skeleton with variable cross-section "assembly design, automatic blanking, factory production, and rapid installation", which converts a large number of high-altitude operations into Ground operations have reduced the amount of personnel working at heights by more than 60%, achieving both quality and quantity.

The project department also adopts the tower-beam synchronous construction technology of walking jacking, and erects the side-span steel box girder at the same time as the construction of the main tower, realizing synchronous jacking, longitudinal jacking and lateral deviation correction during the erection process, ensuring the construction quality and quality of the jacking process. Safe and effective, the construction period was saved by about 3 months, and the construction tasks were completed ahead of schedule, ensuring the smooth closure of the bridge.

After the completion of the Nanzhong Expressway project, it will further enhance the role of Guangzhou's core engine and the connection of Zhongshan nodes, linking up the east-west, south-north passages in the core area of the Greater Bay Area, and boosting the economic and social development of the Greater Bay Area. As a direct expressway from Nansha, Guangzhou to Zhongshan, the round trip between the two places is expected to be shortened by 30 minutes in the future. Editor / Zhao E