According to Article 3(3) of the Notice of the Ministry of Finance, the General Administration of Taxation and the Ministry of Ecology and the Environment on Clarifying Issues Relating to the Application of Taxable Pollutants for Environmental Protection Tax (Cai Shui [2018] No. 117), if taxable air pollutants are discharged in the course of construction, loading, unloading and storage of goods, the emissions of taxable pollutants shall be calculated in accordance with the emission coefficients and material accountancy methods prescribed by the Ministry of Ecology and the Environment; if they cannot be calculated in accordance with the emission coefficients and material accountancy methods prescribed by the Ministry of Ecology and the Environment, the emissions of taxable pollutants shall be approved and calculated in accordance with the sampling and measurement methods prescribed by the competent ecological and environmental authorities of provinces, autonomous regions and municipalities directly under the Central Government.