Climate warming actions have become an important concern for the world. Ardentec conducts GHG inventories of all the Group’ s operational sites and fabs in accordance with inventory guidance, such as ISO 14064-1:2018 and GHG inventory protocols. According to the results of the inventory, the main source of emissions is indirect carbon emissions of purchased electricity derivative scope 2 for 24-hour test machine operation. Direct emission scope 1 is fugitive emission of HFCs from refrigerant of air conditioning system and a small amount of PFCs gas (CF4) used in the test machine, and CO2 and CH4 and N2O emissions caused by the use of gas and diesel vehicles. The data-based indicators from the inventory results are used to understand the impact and influence of operational activities on the environment as the basis of planning GHG reduction strategies.