process.Otherwise, the gun prototypes that existed in Ming and early Qing dynasties would not have remained underdeveloped for so long. One major hurdle was rifling.Without a foundation of machine in...Chapter 248: Let Him Come Overe about the 'prey'. He just chatted with Su Zhentig casually. In a moment, they arrived at the Royal Hunting Ground.As soon as Li Chen arrived at the hunting ground, he saw Su Zhen Ting and immediatel...