On Thursday June 4, Japan's Nikkei 225 opened down 442.74 points (-0.65%) at 67,959.39. South Korea's KOSPI opened down 170.78 points (-1.94%) at 8,630.71.

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Hudian shares jumped to the daily limit intraday after market reports it won a large share of server orders from an overseas AI vendor; the company declined to confirm customer identities. Hudian said operations are stable and projects are proceeding normally, and it expects order volumes to be relatively sufficient through 2027. The company reports 1.6T switch motherboards are in mass production, 3.2T products are advancing steadily, and its Thailand plant is now running above 90% capacity as overseas capacity rollout continues. On full-year revenue guidance, Hudian advised investors to use first-quarter operating data as a reference.