[A-Share Market Close: ChiNext Index Gains 0.64% on Lower Volume, Nearly 4,100 Stocks Rise Across the Market] According to a report by Cailian Press, the market surged and then pulled back, with the three major indices briefly turning negative during intraday trading. The combined turnover of the Shanghai and Shenzhen markets reached 2.08 trillion yuan, a decrease of 431.7 billion yuan compared to the previous trading day. On the board, market hotspots rotated rapidly, with nearly 4,100 stocks rising across the market. From a sector perspective, the pharmaceutical and biotechnology sector saw a collective breakout, with vaccine, cell immunity, recombinant protein, and gene editing segments all performing strongly. Anke Bio, CSPC Innovation, Boteng Shares, CanSino, GenScript Biotech, and BGI Genomics hit the 20% daily limit. The power grid equipment sector was active, with Fengfan Co. achieving 8 limit-ups in 14 days, and Chint Electric hitting the daily limit. The analog chip concept saw a steady rise, with Kangxi Communication and Sirepo gaining over 10%. The optical fiber concept rebounded intraday, with Changying Tong hitting the 20% daily limit and Tongding Internet hitting the daily limit. On the downside, the coal sector surged before quickly retreating, with Antai Group hitting the lower limit.