云鼎科技：子公司北斗天地在北斗卫星通信和导航方面主要产品有基于北斗+无线自组网通信的系列产品等

Group 1 - The core viewpoint of the article is that the company Yunding Technology (云鼎科技) has clarified its involvement in the commercial application of the BeiDou system through its subsidiary, BeiDou Tiandi [2] - BeiDou Tiandi's main products include a series of solutions based on BeiDou and wireless self-organizing network communication, BeiDou III short message terminals, and satellite navigation positioning modules [2] - The products developed by BeiDou Tiandi enable functionalities such as self-organizing network communication, satellite communication, and positioning, although the business volume of these products is relatively small and does not significantly impact the company's overall performance [2]