280k HS Bolts for Baotou-Xi'an RR Yellow River Bridge Smooth

The Baotou-Xi'an Railway Yellow River Grand Bridge spans a total length of 3,918 meters, with nearly 130 trains passing through here daily on their way to various parts of the country.

Sometimes, a rhythmic clinking sound can be heard on the bridge, which is the sound of bridge and tunnel workers tapping on the bolts to check if the Yellow River Grand Bridge is "ailing" and to inspect for potential safety hazards. On the bridge, there are a total of 280,000 such high-strength bolts.