Plastic product manufacturing; plastic product sales; hardware product retail; hardware product wholesale; hardware product manufacturing; wire and cable operation; household appliance manufacturing; household appliance parts sales; household appliance sales; electrical accessory manufacturing; electrical accessory sales; electronic component manufacturing; electronic component wholesale; electronic component retail; electrical instrument manufacturing; electrical instrument sales; metal wire and rope and their products manufacturing; metal wire and rope and their products sales; metal daily necessities manufacturing; metal material sales; daily necessities wholesale; daily necessities retail; metal product sales; automotive parts research and development; automotive parts and accessories manufacturing; mechanical parts and components sales; automotive parts retail; automotive parts wholesale; labor protection product production; labor protection product sales; daily-use mask (non-medical) sales; electrical equipment manufacturing; electrical equipment sales; power facility equipment manufacturing; power facility equipment sales; high-speed rail equipment and parts manufacturing; high-speed rail equipment and parts sales; railway locomotive and rolling stock parts manufacturing; railway locomotive and rolling stock parts sales; photovoltaic equipment and components manufacturing; photovoltaic equipment and components sales; marine supporting equipment manufacturing; metal chains and other metal products manufacturing; metal chains and other metal products sales; metal tool manufacturing; mold manufacturing; mold sales; general equipment manufacturing (excluding special equipment manufacturing); mechanical and electrical equipment manufacturing; mechanical and electrical equipment sales; intelligent robot research and development; industrial robot sales; intelligent robot sales; industrial robot installation, repair and maintenance; industrial robot manufacturing; intelligent power distribution and control equipment sales; power distribution and control equipment manufacturing; software development; Internet of Things technology research and development; Internet of Things technical services; artificial intelligence application software development; industrial Internet data services; optical cable manufacturing; optical cable sales; intelligent instrument manufacturing; intelligent instrument sales; intelligent vehicle equipment manufacturing; technology import and export; import and export of goods.