- Stable improvement in innovation capacity

China's domestically developed supersized shield tunneling machine rolled off the production line on April 22 in Zhengzhou, Central China's Henan province, according to China Railway Hi-tech Industry Corp Ltd, a subsidiary of State-owned China Railway Group Ltd.

Named "Zhengxian", the shield tunneling machine has a diameter of 15.09 meters and weighs 4,400 tons, with several exclusive patents, the company said.

With abundant technical strength, the company continues to focus on the tunnel-boring sector, contributing a Chinese project to global tunnel construction, said Zhuo Puzhou, general manager of CRHIC. Products are exported to more than 30 countries and regions globally, with production and sales being No 1 for the fifth straight year.