Group 1 - A new company, Huangshi Ruixin Machinery Engineering Co., Ltd., has been established with a registered capital of 500,000 RMB [1] - The legal representative of the company is Wu Yuanjian [1] - The business scope includes general projects such as installation services for ordinary machinery, sales of mechanical and electrical equipment, and environmental protection specialized equipment [1] Group 2 - The company also engages in services related to environmental monitoring instruments, maintenance of electronic and mechanical equipment, and labor services [1] - Additional activities include manufacturing refrigeration and air conditioning equipment, sales of emergency environmental technology equipment, and sewage treatment and recycling [1] - The company is authorized to operate projects that are not prohibited or restricted by laws and regulations [1]