Dr. Li'an HOU is an expert in environmental engineering and an academician of the Chinese Academy of Engineering. He is one of the pioneers in China's specialized pollution prevention and control technology. With a long-standing dedication to research in the field of military environmental engineering, he has taken the lead in proposing and successfully developing water treatment and air purification technologies, along with a series of equipment, all of which possess independent intellectual property rights. These achievements mark numerous breakthroughs and have made significant and creative contributions to the exploration and establishment of China's specialized pollution prevention and control system.