Technology development, technology transfer, technical services, and technical consulting in the field of ultrasonic technology; development and sales of ultrasonic welding equipment, hot plate welding equipment, hot riveting and hot melt equipment, automated machinery, automated production lines, laser equipment, vibration welding equipment, vibration friction welding equipment, cutting and stamping equipment, plastic processing equipment and accessories, and molds; self-operated and agent import and export business of various commodities and technologies (except for commodities and technologies that are restricted by the state or prohibited from being imported and exported by enterprises).