宝光股份：公司子公司宝光联悦主要以氢气的生产销售为主

Group 1 - The core viewpoint of the article is that Baoguang Co., Ltd. has clarified its business focus on hydrogen production and sales, along with other specialty gases [2] - Baoguang Lianyue, a subsidiary of the company, primarily engages in the production and sale of hydrogen [2] - The subsidiary also operates in the business of high-purity nitrogen, medical oxygen, helium, neon, and other specialty gases [2]