三七互娱：目前已投资的脑机接口公司包括华南脑控及强脑科技

Group 1 - The core viewpoint of the article is that the company Sanqi Interactive Entertainment has invested in brain-computer interface companies, specifically Huannan Brain Control and Qiang Brain Technology, with investments of 20 million RMB and 20 million USD respectively [1] Group 2 - The investment in Huannan Brain Control amounts to 20 million RMB [1] - The investment in Qiang Brain Technology amounts to 20 million USD [1]