Core Insights - The optical and optoelectronic sector increased by 1.57% on October 21, with Huashu Holdings leading the gains [1] - The Shanghai Composite Index closed at 3916.33, up 1.36%, while the Shenzhen Component Index closed at 13077.32, up 2.06% [1] Sector Performance - Huashu Holdings (000509) closed at 3.45, with a rise of 9.87% and a trading volume of 794,300 shares, totaling a transaction value of 268 million yuan [1] - Zhouming Technology (300232) closed at 7.87, up 8.10%, with a trading volume of 850,800 shares, totaling 662 million yuan [1] - Dongtian Micro (301183) closed at 103.50, increasing by 7.86%, with a trading volume of 106,100 shares, totaling 1.066 billion yuan [1] - Aolide (688378) closed at 25.74, up 7.52%, with a trading volume of 109,200 shares, totaling 278 million yuan [1] - Weida Optoelectronics (920001) closed at 21.59, increasing by 6.20%, with a trading volume of 29,900 shares, totaling 63.67 million yuan [1] Fund Flow Analysis - The optical and optoelectronic sector experienced a net outflow of 134 million yuan from institutional funds, while retail investors saw a net inflow of 415 million yuan [2] - The overall trend indicates a mixed sentiment among different types of investors within the sector [2]