Production of special labor protection products; sales of special labor protection products; manufacturing of specialized chemical products (excluding hazardous chemicals); sales of specialized chemical products (excluding hazardous chemicals); coal-based activated carbon and other coal processing; manufacturing of paper products; sales of paper products; road freight transport of ordinary goods with total mass of 4.5 tons or less (excluding online freight and dangerous goods); production of daily-use masks (non-medical); sales of daily-use masks (non-medical); import and export of goods; technical services, development, consulting, exchange, transfer, and promotion.