去年的世界人工智能大会讨论的问题是，如果不能再获得美国技术（包括英伟达的芯片和硅谷公司OpenAI的聊天机器人ChatGPT），中国将如何推进国内人工智能产业的发展。而今年的会议焦点是中国已在技术上取得了多大进展，以及中国政府影响全球人工智能发展的雄心。

NEW YORK, July 28 (Xinhua) -- A gunman killed four people and injured six others on early Monday evening before shooting himself dead inside an office building in Manhattan, New York City.

NEW YORK, July 28 (Xinhua) -- An active shooter shot at least one police officer and one civilian at an office building in Manhattan, New York City on Monday, local media reported. Police have been ...