ST合纵：湖南赫利俄斯新能源有限公司是公司的全资子公司，其主要业务为电子新材料的研发、制造、销售

Group 1 - The core point of the article is that Hunan Helios New Energy Co., Ltd. is a wholly-owned subsidiary of ST Hezhong, primarily engaged in the research, development, manufacturing, and sales of electronic new materials [1] Group 2 - ST Hezhong responded to an investor inquiry on an interactive platform regarding the business operations of Hunan Helios New Energy Co., Ltd. [1]