A Profitable BusinessThe currency of the Qin Empire was still relatively stable.Basically, one thousand copper coins, or a string of coins, can be exchanged for one tael of silver.The production cost...is already a seasoned master.This old geezer is deeper than anyone else.If not for the constraints of his eunuch status, this guy would undoubtedly be Zhao Xuanji's number one rival in court. It could...