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') was an obscure rapid fire cannon that utilised the concept of superopsed load to shoot multiple explosive incendiary shells in quick succession. It was similar to an upsized Lian Zi Chong (連子銃).

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