The development of multi-storey and high-rise steel frame structures at home and abroad is a witness to the development of steel production at home and abroad.

For example, in China in 1960s, there was a serious shortage of steel for construction projects. Not only do multi-storey and high-rise steel frame structures dare to think and do, but they also strongly advocate saving steel and replacing steel with wood and bamboo, which is still fresh in my memory. Nowadays, China ranks first in steel production and steel inventory in the world, and high-rise concrete frame structures and high-rise steel frame structures have mushroomed!