This aerial photo taken on Oct. 10, 2023 shows a bullet train running on a section of the Guiyang-Guangzhou high-speed railway in Duyun City, southwest China's Guizhou Province. (Xinhua/Yang Wenbin)

The total length of China's operating high-speed rail tracks reached 45,000 km by the end of 2023, data from the national railway operator showed Tuesday.

The operating mileage of China's railway network amounted to 159,000 km, according to a work conference of the China State Railway Group Co., Ltd.

In 2023, the fixed-asset investment in the country's railway sector stood at 764.5 billion yuan (about 107.7 billion U.S. dollars), marking a 7.5 percent increase year on year.

A total of 3,637 km of new tracks went into operation in 2023, including 2,776 km of high-speed railways, the data showed.

Progress in the country's rail infrastructure construction last year includes the completion and operation of 34 railway projects, the initiation of services at 102 railway stations, and the advancement of 112 rail projects that are still under construction, said the company.