中汽股份：中汽股份与中汽中心及其下属企业之间，是明确的客户与供应商业务关系

Core Viewpoint - The announcement from Zhongqi Co., Ltd. indicates a clear client-supplier relationship between Zhongqi Center and its subsidiaries, with Zhongqi Co. providing testing services based on client needs [2] Group 1: Company Operations - Zhongqi Center and its subsidiaries conduct regulatory certification tests and research tests for clients including vehicle manufacturers, parts suppliers, and tire companies [2] - Zhongqi Co. is involved in providing technical services for field testing environments, utilizing specialized automotive testing facilities in China [2] - The testing services are conducted based on agreed service prices and content, highlighting a structured business model [2]