The National Stadium (also known as the Bird's Nest) has recently started trial operations of the "dual Olympics" theme tourism boutique experience, which will be fully opened to the public during the May Day holidays. Visitors can step into the stadium infield to experience the technology behind the opening and closing ceremonies of the Beijing 2022 Winter Olympics; climb to the highest point of the Bird's Nest to learn how the fireworks were set off. Photos: Li Hao/GT