On October 13, Shaanxi Coal and Chemical Industry Group's bid for calcium carbide is set at 2560 yuan/ton. The specifications of the calcium carbide are: grade: first-grade; gas production (20°C, 101.3KPa)/(L/kg) ≥: 280. The validity period of this bid is 3 days. The provider of the bid is Shaanxi Coal and Chemical Industry Group.