In the 1950s, when villagers from Linfeng Township, Weixin County, Yunnan Province were picking bamboo shoots deep in the primeval forest of Daxue Mountain in the territory, they often saw strings of copper coins rising from the tips of bamboo shoots that popped up overnight. The number was spectacular.

Why are there so many copper coins appearing in this rarely visited place? It turned out that this place was a place where Wu Sangui rebels against the Qing court, raises military funds, and privately mints coins.
Back then, Wu Sangui was in charge of Yunnan. He believed that the sky was high and the road was far away, and the court was beyond the reach, and became the local emperor. He repeatedly held his troops to respect himself, threatened the court to demand food, grass and military pay, and secretly expanded his power. The Qing court was prepared for ambitions like Wu Sangui, so he took his son Wu Yingxiong as a hostage and kept hibernating in the capital . There are also strict restrictions on providing military pay to Wu Sangui and strict precautions are strengthened. This made Wu Sangui very angry and accelerated his rebellious preparations, so the court did not create it for himself. Therefore, there is a large number of private coins in the deep mountains and forests of Yunnan, where there are copper mines and to expand the army and prepare for war and fill military pay. Not only that, a large amount of private money was also transported into Sichuan and Shaanxi, and put it on the market to exchange for gold and silver, seriously disrupting the financial order of in the Qing Dynasty.

After learning about this, the Qing court sent heavy troops to Yunnan to destroy the money factory to kill the coin minted people. For a time, Yunnan was full of blood and corpses were everywhere, and white bones were piled up like mountains. Wu Sangui's private minting of coins caused a tragedy on earth, and his crimes are unforgivable.