Group 1 - The electronic chemicals sector increased by 1.65% on January 21, with Jianghuai Micro leading the gains [1] - The Shanghai Composite Index closed at 4116.94, up 0.08%, while the Shenzhen Component Index closed at 14255.12, up 0.7% [1] - Jianghuai Micro's stock price rose by 10.02% to 25.92, with a trading volume of 16,900 lots and a transaction value of approximately 43.68 million yuan [1] Group 2 - The electronic chemicals sector saw a net inflow of 878 million yuan from institutional investors, while retail investors experienced a net outflow of 643 million yuan [2] - The trading data indicates that Zhongshi Technology and Jingrui Electric Materials had significant price increases of 8.64% and 7.07%, respectively [1][2] - The overall trading volume for the electronic chemicals sector was substantial, with notable transactions in stocks like Zhongshi Technology, which had a transaction value of 1.597 billion yuan [1][2] Group 3 - The main net inflow for Jingrui Electric Materials was 387 million yuan, while it faced a net outflow of 225 million yuan from retail investors [3] - Zhongshi Technology had a net inflow of 130 million yuan from institutional investors, with a net outflow of 81.98 million yuan from retail investors [3] - The data reflects a mixed sentiment in the electronic chemicals sector, with some stocks attracting institutional interest while others faced retail selling pressure [3]