Food sales (only pre-packaged food); Internet sales of food (only pre-packaged food); Sales of sanitary supplies and disposable medical supplies; Engineering and technical research and test development; Sales of chemical products (excluding licensed chemical products); Technical research and development of biochemical products; Biomass energy technology services; Development of natural science research and experiment; Sales of health food (prepackaged); Internet sales (except for the sale of goods that need to be licensed); Research and development of industrial enzyme preparations; Retail of pet food and supplies; Wholesale of pet food and supplies; Wholesale of cosmetics; Cosmetics retail; Clothing wholesale; Clothing retail; Technical service, technical development, technical consultation, technical exchange, technology transfer and technology promotion; General merchandise sales; Wholesale of shoes and hats; Retail of shoes and hats; Leather sales; Sales of leather products; Sales of personal hygiene products; Internet equipment sales; Wholesale of musical instruments; Music instrument retail; ; Food business (sales of bulk food); Import and export of goods