Design, sales and installation of solar photovoltaic products and solar photovoltaic systems; Sales of electronic components; Design, development and sales of electronic products; Sales of communication products, digital products and computer products; Sales of security products, paper products, plastic products, metal materials, building materials, machinery and equipment; Hardware, electricity sales; Sales of computers, software and auxiliary equipment; Auto supplies, auto parts, auto decoration materials sales; Sales of smart home products; Operation of e-commerce (involving pre-administrative license, must obtain pre-administrative license documents before operation); Domestic trade; Import and export of goods and technologies (except for items that require approval before registration as stipulated by laws, administrative regulations and decisions of The State Council). ^ Production and processing of solar photovoltaic products