Today, 105 years ago, on October 14, 1920 (Calendar, September 3, 1920), the Tangshan coal mine gas exploded. Miners working in the Tangshan coal mine. On October 14, 1920, the Tangshan coal mine gas exploded, causing the tragedy. In early October, the Tangshan coal miners had discovered the gas content was too high and demanded to stop work. The Belgian miners said: "Only to know coal, not to know what the air is bad," forcing workers to continue mining coal. On October 14, a huge gas explosion occurred, workers died on the site 450 and injured more than a hundred people. After the disaster, coal miners and people from all walks of life were very angry, the labor community, the morning newspaper, etc. repeatedly, revealing the capitalist's fate