Core Viewpoint - The article announces the upcoming "Mayday 5525 Back to That Day" 25th Anniversary Concert in Guangzhou, highlighting the event's significance and associated activities [1] Group 1: Event Details - The concert will take place on December 5 at the Greater Bay Area Cultural and Sports Center in Nansha [1] - A themed market titled "Waves of Tides, Food Moments" will be held concurrently, featuring over 60 stalls offering a variety of foods [1] Group 2: Food Offerings - The market will include a wide range of food options such as hamburgers, bread, beef offal, curry fish balls, egg waffles, ice cream, coffee, and milk tea, catering to diverse tastes [1] - Attendees are encouraged to arrive early to enjoy the food offerings before the concert [1] Group 3: Promotions - Concert ticket holders can enjoy a 5% discount on selected products at the market by showing their tickets to staff [1] - The discount is applicable only to items sold by Guangzhou Nansha International Logistics Co., Ltd. [1]