Introduction to the Mining Site of the British and French Mercury Company: After the Opium War, the imperialist powers of Britain and France established the Wanshan Mercury Mine. In 1898, they used financial inducements to find Chen Mingyuan, who was working as a porter in Shanghai, and instigated him to go to the Prime Minister's Office to petition for permission to undertake the Zhenyuan Qingxi Iron Works. Chen borrowed money from British and French businessmen under a pseudonym, and the foreigners converted the loans into shares and took control of Qingxi Iron Works. factory, but the foreigners had no intention of running the iron factory, so they threatened to pay off the debt, rented the Wanshan mercury mine, and established the "British-French Company". Heidongzi was one of the mining sites occupied by them, and in 10 years they plundered 700 tons of mercury.