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Elon Musk on xAI's Latest Large Model, Grok 4 Fast. Elon Musk's xAI company has launched a new large model, Grok 4 Fast. An X user posted, "Grok 4 Fast is a very special model. Honestly, not long ago I didn't even think this level of intelligence density was possible." Musk responded, "Intelligence density per unit of memory and compute is a fundamental metric. My rough guess is that the large model is at least one, but possibly two, orders of magnitude away from the Platonic maximum."

The Trump administration announced Friday that it will require companies to pay a $100,000 annual fee for H-1B visas, prompting some major tech companies to advise visa holders to stay in the United States or return as soon as possible. This change could deal a significant blow to the tech industry, which relies heavily on skilled talent from countries like India. Since taking office in January, Trump has launched a sweeping immigration crackdown, including measures to restrict some forms of legal immigration. This reform of the H-1B visa program is the administration's most closely watched change to the temporary work visa system to date. U.S. Commerce Secretary Howard Lutnick said, "If you're going to train talent, you should be training recent graduates from our nation's top universities. You should be training Americans, not bringing in outsiders to take our jobs." The Trump administration's threat to crack down on the H-1B visa system has become a major point of contention with the tech industry, which donated millions of dollars to his presidential campaign. According to internal emails reviewed by the media, Microsoft, JPMorgan Chase, and Amazon have responded to the announcement by advising their H-1B visa employees to remain in the United States. The companies are advising H-1B visa holders currently outside the United States to return to the United States before midnight on Saturday, when the new fee system takes effect. In an email sent to employees of the US investment bank, Ogletree & Deakins, the law firm that handles visa applications for JPMorgan Chase, wrote: "H-1B visa holders currently in the United States should remain in the United States and avoid international travel until the government issues clear travel guidance."

[Huawei: The number of HarmonyOS 5 terminals has exceeded 17 million] On September 20, at the Huawei Connect 2025 Conference (HUAWEI CONNECT 2025), Huawei announced that the number of HarmonyOS 5 terminal devices has exceeded 17 million. At the same time, Huawei will launch the "Tiangong Plan" and will invest 1 billion RMB in funds and resources in the future to fully support the innovation of the HarmonyOS AI ecosystem.

Xiaomi's Lei Jun: The new Xiaomi Tablet 8 Pro, equipped with Snapdragon 8 Extreme Edition, is the most powerful Xiaomi tablet ever

[Domestic flexible OLED mobile phone screens account for more than 60% of the market, and the next step is to move towards high-end profitability] According to a Sigmaintell research report, in the first half of 2025, global shipments of flexible OLED mobile phone screens will be nearly 300 million units, a year-on-year increase of approximately 5.2%. Chinese mainland panel manufacturers shipped approximately 190 million units of flexible OLED mobile phone screens, a year-on-year increase of approximately 7.7%, and their global market share increased to 62.3%. BOE and Tianma's flexible OLED mobile phone screen shipments in the first half of the year were approximately 71 million units and 43.2 million units, respectively, a year-on-year increase of 10.3% and 15.6%, ranking second and third in the global market share, narrowing the gap with Samsung, which ranks first. When talking about how to make the flexible OLED business profitable as soon as possible, Liu Qingquan, head of Tianma's marketing department, believes that with technological innovation, localization of materials, design optimization and improved factory efficiency, the profitability of domestic OLED screens will still have room for improvement in the future.

According to the Indonesian Center for Volcanology and Geological Disaster Mitigation, at 13:29 local time on September 20, the Levotobi volcano in East Nusa Tenggara Province, Indonesia, erupted. The ash column reached a maximum of 2,500 meters and the eruption lasted about 129 seconds.