<div id="readability-page-1" class="page"><div><p><span>China's AI trade is starting to look much bigger than chips. Zhongji Innolight, a Chinese optical transceiver maker and Nvidia </span><span> supplier, has overtaken Contemporary Amperex Technology Co. as the largest-weighted company in the CSI 300 Index, showing how AI infrastructure demand could be reshaping China's equity benchmark.</span></p><p><span>The move marks a notable shift in market leadership. Zhongji Innolight now accounts for 5.3% of the CSI 300 Index, ahead of CATL at 4% and Kweichow Moutai at 3%. Last month, the company took the No. 1 spot from CATL, the world's biggest battery maker, while Kweichow Moutai now sits in third place, a reminder that old-economy leaders such as liquor producers may be losing some market influence to AI-linked hardware names.</span></p><p><span>For investors, the signal could be important. The AI rally in China appears to be expanding beyond chipmakers into the wider supply chain, especially optical firms tied to high-speed connectivity and AI infrastructure. Fu Zhifeng, chief investment officer at Shanghai Chengzhou Investment Management, said the weighting change reflects a sweeping industry reshuffle, with booming AI optical hardware replacing legacy sectors. Nvidia CEO Jensen Huang's recent comments on the optical sector's role in AI infrastructure have also helped fuel investor interest in companies such as Zhongji Innolight.</span></p></div></div>

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<p>Zhongji Innolight, a Chinese optical transceiver maker and Nvidia supplier, has become the largest-weighted company in the CSI 300 Index with a 5.3% share, surpassing CATL and Kweichow Moutai. This shift highlights the growing dominance of AI infrastructure demand over traditional sectors like batteries and liquor. The change reflects an industry reshuffle where AI-linked hardware is replacing legacy industries, driven by expanding investor interest in high-speed connectivity solutions.</p>

China AI Supplier Takes Top CSI 300 Spot With 5.3% Weight