复式4个数三中三多少组

简介：Cao Min was originally the supplier of Fujian Iron and Western Iron to the Zhenlu Factory, but the prices of the two irons were too high and the court could not afford it. Later, it was changed to Jin Iron. However, the quality of other people's Jin Iron was unreliable. Cannons were good and bad, so ordinary people went to Shanxi to open an iron factory.