Wu Di Jiang Jun (無敵將軍)

Drawing of a Wu Di Jiang Jun (highlighted), from 'Chong Ke Wu Lue Shen Ji (《重刻武略神機》'.

Wu Di Jiang Jun (無敵將軍, lit. 'Invincible general') is an obscure rapid fire cannon that utilise the concept of superopsed load to shoot multiple explosive incendiary shells in quick succession. It is similar to an upsized Lian Zi Chong (連子銃).

Despite similar sounding names, this cannon is unrelated to Wu Di Da Jiang Jun (無敵大將軍), which is a heavy breech-loading cannon.