互联网电商板块8月21日涨2.57%，跨境通领涨，主力资金净流入8.05亿元

Core Insights - The internet e-commerce sector experienced a rise of 2.57% on August 21, with Kuaijingtong leading the gains [1] - The Shanghai Composite Index closed at 3771.1, up 0.13%, while the Shenzhen Component Index closed at 11919.76, down 0.06% [1] Stock Performance - Kuaijingtong (002640) closed at 6.06, with a significant increase of 9.98%, trading volume of 3.6131 million shares, and a transaction value of 2.125 billion [1] - Santai Co., Ltd. (301558) saw a rise of 5.28%, closing at 10.16, with a transaction value of 644 million [1] - Guolian Co., Ltd. (603613) increased by 5.21%, closing at 26.25, with a transaction value of 1.031 billion [1] - Other notable performers include Saiwei Times (301381) up 4.21% and Jihong Co., Ltd. (002803) up 3.54% [1] Capital Flow - The internet e-commerce sector saw a net inflow of 805 million from institutional investors, while retail investors experienced a net outflow of 474 million [2][3] - Kuaijingtong had a net inflow of 164.514 million from institutional investors, but a net outflow of 296 million from retail investors [3] - Guolian Co., Ltd. had a net inflow of 75.1638 million from institutional investors, with a net outflow of 91.946 million from retail investors [3]