In what way did Qin Shihuangdi maintain power?

Don’t mind the already marked answer but taking it now

How was the method of making pottery by using coils of clay better than simply shaping the clay by hand? it prevented pottery from cracking when fired. it created a watertight seal. it produced more attractive pottery. the pottery could be cut or stamped with designs.

When top-roping is used, how long should the rope be in order to protect the climber throughout the climb?