Why is there no cold weapons production base in Northeast China?

Northeastern people are too tough and have been the birthplace of bandits and robbers since history.

Therefore, it is normal for the imperial court to strictly control weapons in the Northeast and prohibit private steelmaking and weaponry.

On the contrary, the south has been an uncivilized land since ancient times. It has high mountains and dense forests and a small population, so it is suitable for seclusion.

Those sword-making masters were all reclusive masters. After accepting apprentices, the apprentices all made a living by making swords and lived together. Over time, they formed a famous sword-producing town.