30 meters underground on the north portal of the Yellow (Yangzhi) River in Jinan, Shandong, with the assembly of 500 rings of segments of the "Shanhe" shield machine completed, the excavation of the Jinan Huanggang Road Tunnel through the Yellow River, co-constructed by China Railway 14th Bureau, exceeded 1,000 meters, marking a phased achievement in the world's largest-diameter underwater shield tunnel.

The tunnel project is 5,755 meters long, with a designed speed of 60 kilometers per hour. The shield section is approximately 3,290 meters long, with segment outer diameter of 16.8 meters. It has a single-tunnel, double-layer, two-way, six-lane structure. It is constructed by the "Shanhe," the China's largest-diameter slurry shield machine under construction, with an excavation diameter of 17.5 meters.

Unicrane has supplied 2 sets of OD16.8m tunnel segment mould by Sept of 2023 for the project after 2014 the world largest tunnel TBM project with OD17m in Hong Kong for TMLCKL subsea tunnel.