The eastern city of Huzhou is planning to build a 6 billion yuan (HK$5.6 billion) bridge stretching 68km across scenic Tai Lake to improve transport links in the Yangtze River Delta, a newspaper reported.
If the project is approved by the central government, the bridge would be the world's longest. According to Guinness World Records, the current record holder is the 38km Second Lake Pontchartrain Causeway in the US state of Louisiana.
The bridge, carrying a four-lane highway, would link the city in Zhejiang province to Wuxi in Jiangsu province on the northern side of the lake, the Oriental Morning Post said. Tai Hu, located on the border of Zhejiang and Jiangsu, is a major attraction for domestic tourists and a centre for the fishing industry.
Huzhou planning officials were quoted by the newspaper as saying research on the project was already under way.
Huzhou hopes the bridge will improve transport links with Jiangsu and Shanghai, and bring in more foreign investment.
Zhejiang is already building the world's largest sea-crossing bridge, a 36km span across Hangzhou Bay.