Ningxia Zhongyuan Cable is a cable manufacturer located in Ningxia, China. As far as I know, Ningxia Zhongyuan cable is produced according to national standards. The national standards for cables are formulated and issued by China National Standardization Administration Committee. The national standard cable is produced according to the requirements of national standards, which has certain quality assurance and market recognition. Non-standard cables refer to products that do not meet the requirements of national standards. Therefore, according to the current information, Ningxia Zhongyuan cable should be a national standard cable produced according to national standards.
But please note that my answer is based on common sense and information, and the specific situation needs further verification. If you need a more accurate answer, I suggest you contact Ningxia Zhongyuan Cable directly to consult their product standards and certification.