科信技术：目前公司国内客户销售收入主要通过招投标方式产生

Group 1 - The core viewpoint of the article is that Kexin Technology generates domestic sales revenue primarily through bidding processes, while international revenue is derived from project research and development collaborations [2] Group 2 - The company engages in a bidding process for domestic clients to secure sales [2] - For international clients, revenue is generated through collaborative research and development projects [2]