Chapter 502: Please Help, Mr. Advisor

refecture, working alongside Zheng Bao Rong to promote sweet potatoes. However, do not think that your seniority and familial connection to me give you the right to overlook Zheng Bao Rong."He is the...ous.Everyone knows that saltpeter is used to make gunpowder.Formerly, gunpowder played a relatively minor role in warfare. Even during the technologically advanced Qin Dynasty, their advancements were...