Crazy on the left, genius on the right.
Chen Ze traveled through time and lived in the body of a down-and-out scholar in the Great Xia Dynasty...
Originally, he just wanted to farm and develop stably, but he never thought that bandits would be rampant and invaded by all nations...
If it's a problem that Qin Nu can't solve, then use the rifle!
If it's a problem that can't be solved by siege engines, then you have to use cannons.