neless cowards" Yelu Guzanqi sneered.Wang Tenghuan nodded and bowed, saying: "We already know what happened outside. This old man is here to apologize to the Ninth Prince, please forgive me.""What are...was not extensive, but he knew that the rifling was a meticulously crafted process.Otherwise, the gun prototypes that existed in Ming and early Qing dynasties would not have remained underdeveloped fo...