China's stock markets ended slightly lower on Tuesday, as investors stayed cautious amid global tensions. The Shanghai Composite edged down 0.19%, while the Shenzhen Component fell more sharply by 1.1%. Uncertainty around US'Iran relations, especially talks over reopening the Strait of Hormuz, kept market sentiment under pressure.

Technology stocks were among the biggest drags. Zhongji Innolight dropped after reports that China blocked Meta's acquisition of Manus AI, highlighting tighter control over AI and concerns about technology security. Battery giant Contemporary Amperex Technology also declined after announcing plans to raise $5 billion through a discounted share sale, even as it secured a new battery deal.

On the policy side, China's leadership signaled support for the economy, with the Politburo stressing the need to strengthen energy security and protect against external risks.