On October 9, the final roof slab pour for the CX-WX2 section of the Taihu Tunnel project, undertaken by CCCC Third Harbor Engineering Co., Ltd., was successfully completed.

On October 9, with the successful completion of the final roof slab pour, the main structure construction of the Taihu Tunnel on the Suzhou-Wuxi-Changzhou South Expressway—China's longest underwater tunnel currently under construction, with a total length of 10.79 kilometers—was fully completed, and the tunnel has been fully enclosed.

The Changzhou-Wuxi section of the Suzhou-Wuxi-Changzhou South Expressway has a total length of 43.9 kilometers, including 22.43 kilometers in Wuxi and 21.47 kilometers in Changzhou. The entire line is built to a six-lane expressway standard. As a key controlling node of the Suzhou-Wuxi-Changzhou South Expressway, the Taihu Tunnel passes beneath the Meiliang Lake waters of Taihu Lake.

Since the successful pouring of the first bottom slab concrete in July 2018, more than 3,000 builders have worked through over 1,200 days and nights, gradually completing key milestone works including the first roof slab pour, the first water reintroduction operation, the tunnel cofferdam closure, the bottom slab breakthrough, and the roof slab enclosure.