沪指失守3900点，恒生科技指数跌超3%

Group 1 - The four major A-share indices accelerated their decline in the afternoon, with all indices dropping over 1%, and the Shanghai Composite Index falling below 3900 points again [1] - More than 4500 stocks in the entire market experienced a decline [1] - Sectors such as power grid equipment, BC batteries, and computing power leasing saw the largest declines [1] Group 2 - The Hong Kong stock market also declined, with the Hang Seng Technology Index dropping over 3% and the Hang Seng Index falling nearly 2% [1]