Manufacture of hardware products; manufacture of plastic products; sales of metal products; sales of plastic products; manufacture of hand carts and animal-drawn vehicles; sales of hand carts and animal-drawn vehicles; research and development of new materials; research and development of hardware products; technical services, technical development, technical consulting, technical exchange, technology transfer, and technical promotion; import and export of goods; import and export of technologies; sales of outdoor products; sales of household products; sales of daily necessities; leasing of non-residential real estate.