On July 31, the Cyberspace Administration of China (CAC) summoned NVIDIA to provide an explanation and submit relevant proof regarding the security risks and potential backdoor vulnerabilities in the H20 computing chips sold to China. It is reported that recently, NVIDIA's computing chips have been exposed to serious security issues. In response, NVIDIA stated that its chips do not contain any remotely accessible or controllable 'backdoors.' Previously, news about the resumption of H20 sales to China had catalyzed a surge in NVIDIA's stock price, setting multiple new record highs. Will this summons affect the H20 sales to China? What impact will it have on NVIDIA's stock price? Will this present an opportunity for domestic chip alternatives?