Is China's world-class bridge building technology the reason for its long history of bridge building? There was no physics in ancient China, so how was the bridge building technology passed on?

China's bridge-building technology is world-class, because China has a long history of bridge-building. There is no physics in ancient China, that bridge building technology is passed down from generation to generation by people's word of mouth. In fact, every seemingly profound learning, behind is very simple reason, do not need to say must have very high learning, in order to do very precise and beautiful craft technology.