The A-share market opened higher today, with the Shanghai, Shenzhen, and ChiNext indices all showing gains. The optical module sector continued its upward trend, with several stocks experiencing significant increases. Conversely, the biotechnology and engineering machinery sectors saw declines. In other news, the People's Bank of China conducted a 7-day reverse repurchase operation, injecting liquidity into the market. AI
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RANK_REASON This cluster discusses stock market movements and economic indicators, not a specific AI-related event.