万能四码详解

简介：Sun Yuanhua, courtesy name Chuyang and nickname Huodong, was born in Gaoqiao Town, Chuansha County, Shanghai, and was a member of Tianqijian Juren. He was a true expert on Western artillery. He learned Western firearms techniques from Xu Guangqi, and was recommended by Sun Chengzong as the Secretary-General of the Ministry of War. Later, he built a fort on the border to make artillery and became the head of the Ministry of War.