Group 1 - The electronic chemicals sector increased by 2.51% on August 4, with Siquan New Materials leading the gains [1] - The Shanghai Composite Index closed at 3583.31, up 0.66%, while the Shenzhen Component Index closed at 11041.56, up 0.46% [1] - Siquan New Materials had a closing price of 122.12, with a significant increase of 12.02% and a trading volume of 116,800 shares, resulting in a transaction value of 1.377 billion yuan [1] Group 2 - The electronic chemicals sector experienced a net outflow of 221 million yuan from institutional investors and 186 million yuan from retail investors, while retail investors had a net inflow of 408 million yuan [2] - The trading data indicates that major stocks like Tiancheng Technology and Nanda Optoelectronics saw varying levels of net inflow and outflow from different investor categories [3] - Notable stocks such as Puyang Huicheng and Feiwo Tai showed mixed investor sentiment, with some experiencing net inflows while others faced outflows [3]