The Nanxiwan Airport Bridge successfully achieved millimeter-level docking.

In the early morning of September 9th, as the 25,000-ton T-shaped rigid bridge rotated precisely at 77.49 degrees in the air at a height of 67 meters, the key and control project of the Nanniwan Airport Bridge on the eastern bypass of Yan'an Expressway was successfully connected to within millimeters, marking a breakthrough in China's construction of complex geological and railway-spanning long-span bridges.