中机认检：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 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]