滚动更新丨美股三大指数集体高开，热门中概股走高

Group 1 - Popular Chinese concept stocks are rising, with Miniso up over 9%, NIO up over 6%, and Alibaba up over 2% [1][2] - The three major U.S. stock indices opened higher, with the Dow Jones up 0.37%, S&P 500 up 0.23%, and Nasdaq up 0.19% [2] - NIO's pre-market trading continued to rise over 5% following the announcement of the new ES8 pre-sale on August 21, with prices starting at 416,800 yuan for the luxury version [3] Group 2 - Miniso's stock rose nearly 8% in pre-market trading, driven by a Q2 revenue growth of 23% year-over-year, exceeding expectations [3]