Manufacturing and processing of plastic industrial parts, lighting fixtures, vehicle parts, agricultural machinery components, postal distribution boxes, junction boxes, cable hooks, metal heating wires, mechanical parts, hardware, electrical accessories, electronic components, and molds; sales of chemical raw materials and products, metal materials, hardware, and electrical accessories; lighting product testing technical services; mold research and development; self-operated and agent import and export of various commodities and technologies, except those restricted or prohibited by the state. Fabric textile processing; household textile finished product manufacturing; industrial textile finished product manufacturing; industrial textile finished product sales; daily-use mask (non-medical) production; daily-use mask (non-medical) sales; medical mask production; medical mask retail.