Group 1 - The PET copper foil concept increased by 2.09%, leading the sector in gains, with 27 stocks rising, including Nord Shares and Yinglian Shares hitting the daily limit [1] - Notable gainers included Zhongyi Technology, Jingwei Huikai, and Defu Technology, which rose by 18.44%, 10.84%, and 9.55% respectively [1] - The sector saw a net inflow of 617 million yuan from main funds, with 30 stocks receiving net inflows, and five stocks exceeding 50 million yuan in net inflow [1] Group 2 - Yinglian Shares, Jingwei Huikai, and Woge Optoelectronics had the highest net inflow ratios at 41.31%, 14.48%, and 14.09% respectively [2] - The top stocks by net inflow included Yinglian Shares with 258 million yuan, Jingwei Huikai with 116 million yuan, and Nord Shares with 89 million yuan [2] - The trading volume for Yinglian Shares was 25.75 million yuan, with a turnover rate of 18.02% [2]