Group 1 - The company is currently in the cultivation stage of its hydrogen fuel cell and hydrogen internal combustion engine testing business, which contributes a small proportion to the overall revenue [2] - The company advises investors to be aware of investment risks related to this business segment [2] - Information regarding the company's partners should be referenced from official announcements [2]

Group 1 - The core viewpoint of the article is that Zhongji Renkeng (301508.SZ) is currently in the cultivation stage for its hydrogen fuel cell and hydrogen internal combustion engine testing business, which constitutes a small proportion of the company's overall revenue [1] Group 2 - The hydrogen fuel cell and hydrogen internal combustion engine testing business is still in its early development phase [1] - The revenue contribution from this segment is minimal at present [1]