General equipment manufacturing (excluding special equipment manufacturing); special equipment manufacturing (excluding licensed professional equipment manufacturing); special equipment manufacturing for lighting equipment production; metal processing machinery manufacturing; machinery equipment sales; electronic special material research and development; household appliances research and development; hardware product research and development; paper product manufacturing; paper product sales; food plastic packaging container tool product sales; kitchenware, sanitary ware and daily sundries wholesale; motor manufacturing; pump and vacuum equipment manufacturing; pump and vacuum equipment sales; general valve and cock manufacturing.