Nvidia started producing chips tailored for the Chinese market after former US President Joe Biden banned the company from exporting its most powerful products to China, in an effort to rein in Beijing's progress on AI. Beijing's regulators have recently summoned domestic chipmakers such as Huawei and Cambricon, as well as Alibaba and search engine giant Baidu, which also make their own semiconductors, to report how their products compare against Nvidia's China chips, according to one of the people with knowledge of the matter.