Rigid is the first private company in China capable of developing high-end Stirling technology, which is an efficient external combustion engine with applications ranging from aerospace to medical equipment. Their innovative Free-Piston Stirling Cooler (FPSC) boasts low energy consumption and precise temperature control, making it ideal for vaccine transport and diverse industries. The document also outlines the company's advanced manufacturing capabilities and the significant market potential for Stirling devices, including various proposed projects and applications.