中机认检(301508.SZ)：目前氢燃料电池及氢内燃机检测业务尚处于培育阶段，占公司整体营收比例很小

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]