Group 1 - The PVDF concept sector rose by 1.74%, ranking 7th among concept sectors, with 9 stocks increasing, including Puxin Technology and Dongyang Sunshine hitting the daily limit [1][2] - Notable gainers in the PVDF sector included Juhua Co., which increased by 6.88%, Sanmei Co. by 3.83%, and Yonghe Co. by 3.69% [1][4] - The sector experienced a net inflow of 485 million yuan from main funds, with Puxin Technology leading the inflow at 205 million yuan [2][3] Group 2 - The top stocks by net inflow ratio included Puxin Technology at 11.52%, Huahua Technology at 9.25%, and Heimao Co. at 8.54% [3] - The trading volume for Puxin Technology was 20,509.85 million yuan, with a daily turnover rate of 3.84% [3] - The stocks with the largest declines included Zhongchuang Environmental Protection, which fell by 5.58%, and Jinming Precision Machinery, which decreased by 2.21% [1][4]