Group 1 - The 21st China (Changsha) International Auto Expo opened on December 10, 2023, at the Changsha International Convention and Exhibition Center, attended by notable figures from the China Automobile Industry Association and local government [1] - The auto show features 71 well-known automotive brands and nearly 1,000 new car models, covering an exhibition area of 80,000 square meters [3] - Major new energy vehicle brands such as Hongmeng Zhixing, NIO, and Li Auto participated, while domestic brands like BYD and Chery showcased their strengths, and joint ventures like SAIC Volkswagen and FAW Toyota offered significant discounts [3] Group 2 - The event serves as a "showcase" for new models and technologies, with over 20 debut vehicles including the Yangwang U9 Xtreme and Deep Blue L06 making their first appearance in Central China [3] - BYD presented its technological capabilities with a 1,500 square meter booth, while Hongmeng Zhixing showcased cutting-edge intelligent driving technology [3] - The third "Ten Thousand People Auto Group Purchase Event" has been upgraded to integrate brand resources and provide multiple discounts, alongside various themed experiences such as the "Super Intelligent Driving Conference" and "AI Technology Camp" [3]