Plastic product manufacturing; Plastic product sales; Mold manufacturing; Mold sales; Metal structure manufacturing; Metal structure sales; Mechanical parts and parts processing; Mechanical parts and parts sales; Electronic component manufacturing; Electronic special materials manufacturing; Electronic special material sales; New material technology research and development; Packaging materials and product sales; Plastic surface treatment; Goods import and export; Technology import and export; Battery manufacturing; Battery sales; Battery spare parts production; Battery spare parts sales; Wearable smart device manufacturing; Wearable smart device sales.