What did Qi Shenggao throw on the boat?

The crescent-shaped instrument that Qi Shenggao threw on the ship is a kind of divination. Taoist divination ceremony is called cup throwing.

Gao Qisheng, the younger brother of Gao Qiqiang, is an excellent student in the Polytechnic University. My parents died early, and my brother Gao Qiqiang brought them up. At that time, Gao Qiqiang was just a child, so the three brothers and sisters had a hard time.