开盘：沪指跌0.28%，创业板指跌1.14%，铜缆高速连接、CPO、虚拟机器人概念走弱

Market Performance - On August 20, the A-share market opened with the Shanghai Composite Index down by 0.28% [1] - The Shenzhen Component Index decreased by 0.61% [1] - The ChiNext Index fell by 1.14% [1] - The North Star 50 Index declined by 0.38% [1] Sector Performance - Strong performance was observed in sectors such as generators, HIT batteries, TOPCon batteries, vanadium batteries, and geothermal energy concepts [1] - Weak performance was noted in synchronous reluctance motors, Kirin batteries, copper cable high-speed connections, CPO, and virtual robot concepts [1]