Hangzhou AAC Technologies Marine Instruments Co., Ltd. (hereinafter referred to as AAC Technologies Marine Instruments) was established in 2004. It is a wholly-owned subsidiary of China Shipbuilding Industry Corporation (stock code: 600764), a listed company under China Shipbuilding Group. The company was established based on the core technical strength of the 715 Research Institute of China Shipbuilding Group Corporation. Its main businesses include the research and development and production of underwater acoustic detection equipment, ultrasonic testing equipment, acoustic sensors, and piezoelectric components. Located in Hangzhou, Zhejiang Province, the company is a "National High-tech Enterprise" and has established the Zhejiang Provincial "Marine Engineering Technology Enterprise Research Institute." It is also a "Science and Technology-based SME," "Innovative SME," and "Gazelle Enterprise" in Zhejiang Province. Suzhou Lechi Machinery Co., Ltd. (established in 1996; currently operational since 2010) is a comprehensive enterprise integrating design and R&D, precision intelligent manufacturing, and close-proximity customer service. The company provides clients with high-precision die-cutting molds, precision component machining, precision ceramic part processing, and related solutions. The company is certified to GJB 9001C quality management system and has established a complete quality assurance system. Adhering to the principle of "first-class management, first-class products, first-class quality, and first-class service," the company implements full-process control and is dedicated to providing high-quality products and services to its customers.
