Research, development, design, manufacture, sales, repair, leasing, technical consulting, testing and technical services of braking systems and their components and test devices for railway passenger cars, EMUs, and urban rail transit equipment; research, development, design, manufacture, sales, repair, leasing, technical consulting, testing and technical services of braking systems and their components and test devices for heavy-duty vehicles, industrial and mining vehicles, and wind power generation equipment; self-operated and agent import and export of various commodities and technologies (except those restricted or prohibited by the state).