Sioux state environmental technology ltd. Is registered in room 44 of the 1st building of hong ki fuku square, kunsan development region, with the registration authority of the city of kunshan administrative approval authority, with legal representatives representing zhang dandan, and is operating on licensed projects: import and export of goods; import and export of technology (projects subject to legal authorization and subject to the approval of the relevant authorities for the conduct of business activities, subject to the approval of specific projects); general projects: technical services, technology development, technical advice, exchange, technology transfer, technical promotion; sale of specialized equipment for environmental protection; sale of machinery; maintenance of electronic, mechanical equipment (other than special equipment); sale of instrument instruments; repair of instrument meters; sale of electrical equipment; engineering management services; monitoring of environmental protection; sale of fire-fighting equipment; distribution of computer hardware, hardware and assistive equipment (in addition to legally approved projects, autonomous operations under the business licence)