热门中概股美股盘前多数下跌，知乎涨超2%

Core Viewpoint - The majority of popular Chinese concept stocks in the US market are experiencing declines, with notable drops in several key companies [1] Group 1: Stock Performance - Xiaopeng Motors, Li Auto, and NIO have all fallen by over 2% [1] - Alibaba, JD.com, iQIYI, and Miniso have seen declines exceeding 1% [1] - Zhihu has increased by over 2%, while Douyu has risen by over 1% [1]