突发！英伟达被约谈！

Group 1 - The core issue highlighted is the serious security vulnerability found in Nvidia's computing chips, which has raised concerns regarding their sale to China [1] - U.S. lawmakers have called for advanced chips exported from the U.S. to include "tracking and positioning" features, indicating a shift in regulatory requirements for technology exports [1] - Nvidia's technology for "tracking and positioning" and "remote shutdown" is reportedly mature, which could have implications for user data security in China [1] Group 2 - Following the news about Nvidia, stocks related to Huawei's HiSilicon surged, with companies like Digital China rising over 6% and Zhuoyi Information increasing by over 4% [2]