Chapter 702: Soap

the ground.Chen Tong stood there, watching coldly without saying a word.Duan Jinjiang chuckled self-deprecatingly and said, "Perhaps I've been standing for too long. My blood circulation is a bit unu...usly crafted 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 o...