The registration address of dong jia-yu inspection equipment ltd. Is located in room 101, 4th street, yang ping village, dong ping city, guangdong province. The registration authority is the market supervision authority of dong pyong city, represented by legal persons hu hae-xia, operating in the areas of research and development, production and distribution, processing and online marketing: detection equipment, automation equipment, instrumentation instruments, electronics products, hardware products, electrical products, daily department goods; import and export of goods or technology (except for the import and export of goods and technologies which are prohibited by the state or involve administrative approval). (projects subject to legal approval are not allowed to operate without the approval of the relevant authorities) i'm not sure