Guo Xing Ping (國姓瓶)

A Guo Xing Ping, National Museum of China.

Guo Xing Ping (國姓瓶, lit. 'Imperial surname bottle') was a type of simple ceramic grenade widely used by the army of Koxinga, from which it later derived its name. To this day the grenade is still occasionally found by fishermen from coastal area of Fujian province.