Production, filling, sale and transportation of industrial gases, medical gases, standard gases, special gases, mixed gases, food additive gases, electronic chemicals, gas products technical consulting, gas testing, gas cylinder inspection and treatment, storage services, ammonia sales (limited to branch operations), plastic products production and sales, warehousing (excluding dangerous explosives), leasing, cargo transport##; import and export of goods. (For projects requiring approval according to law, business activities can only be carried out after approval by the relevant departments.)