Development, sales, manufacturing and sales of computer software, hardware and auxiliary equipment, electronic products (excluding electronic publications), general machinery, automobile spare parts (excluding engines), motorcycle spare parts (excluding engines), communication equipment (excluding satellite ground transmitting and receiving equipment), chemical products (excluding hazardous Chemicals and Class I precursor drugs), building materials (excluding hazardous chemicals), metal materials (excluding rare and precious metals), general equipment, hardware, electricity, import and export of goods, import and export of technology (except items prohibited by laws and administrative regulations; items restricted by laws and administrative regulations can only be operated after obtaining a license).