12月21日，嘉宾敲锣宣布先农坛庆成宫正式面向社会公众开放。本版摄影/新京报记者 浦峰
Hans-Christoph Steiner
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Google, ChatGPT-maker OpenAI and Elon Musk's xAI which makes the AI chatbot Grok were also awarded contracts of up to $200m (£148m) each.