Manufacturing, processing and sales of stainless steel doors, copper doors, wooden doors, aluminum alloy doors and windows, door accessories, smart locks, daily plastic products, power tools, household appliances, auto parts, motorcycle parts (excluding engines), fitness equipment (excluding crossbows); processing and sales of fireproof materials (except Yongkang Municipal Government Enterprise Investment Negative List Project); sales of security doors and fireproof doors; import and export of goods and technology