Import and export business of goods and technology, general items of medical mask production: production and sales: labor protection supplies, auto parts, motorcycle parts, plastic products, rubber products, building materials (excluding hazardous chemicals), electronic components, clothing, gloves, shoes and hats; sales: computer software and auxiliary equipment, hardware, communication, electronic products (excluding electronic publications), household appliances, general equipment, production of industrial textile products, retail of medical masks, wholesale of medical masks