Hong Kong stocks opened lower, with the Hang Seng Index down 0.50% and the Hang Seng Tech Index down 0.38%. PCB and artificial intelligence stocks strengthened, while chip, non-ferrous metals, and new energy vehicle stocks weakened. XtalPi (02228.HK) rose more than 4% after the company reached a strategic cooperation agreement with a well-known international pharmaceutical company for AI drug discovery worth more than US$400 million.