美股中概股盘前多数上涨，拼多多涨7%

Core Viewpoint - The majority of Chinese concept stocks in the US pre-market are experiencing gains, indicating positive market sentiment towards these companies [1] Group 1: Stock Performance - Pinduoduo is up by 7% [1] - Bilibili has increased by 4% [1] - Alibaba shows a rise of 3% [1] - Trip.com is up by 2% [1] - JD.com has gained 1% [1] - NIO is up by 0.6% [1]