Question

In what way(s) did the Chinese use steel and iron

Answer 1

to make agricultural tools and  to make chains for suspension bridges

Answer 2

Iron is one of the most abundant elements on earth, although it is most commonly found in compounds such as iron oxide that have little obvious use to civilizations. The development of ironworking techniques is significant enough to warrant its own anthropological term; a society that has come to rely on them has reached its "iron age." China was one of the earliest societies to use advanced ironworking techniques and develop steel.