Group 1 - The core idea of the articles is that Haidilao is launching seasonal promotions and new menu items to enhance customer experience during the autumn season [1][3][5] - Haidilao has introduced a "Freshly Cut and Caught Season" in Nanjing, featuring Angus beef and fresh seafood, with precise cooking times for optimal taste [1] - In Shandong, a new "Spicy Beef Oil Pot" is being offered, along with unique dishes like Capybara mousse, creating a vibrant dining atmosphere [3] Group 2 - Special promotions for university students are available in Suzhou, Nantong, Yancheng, and Lianyungang, including discounts and free gifts for new students [5] - The "Surprise Duet" promotion in Shaanxi, Shanxi, and Hunan features soft tofu paired with a sweet tea drink, available until September 30 [3] - Haidilao aims to provide a warm and personalized dining experience through regional specialties and thoughtful customer engagement [5]