On Sunday, the members of TFBOYS, Wang Yuan (left), Wang Junkai and Yi Yangqianxi, reunited in Xi’an, Northwest China’s Shaanxi province, for a concert to mark the 10th anniversary of the group’s founding. Photo: VCG

TFBOYS hold up their anniversary “cake” during the concert to prevent it from collapsing. Photo: Screenshot from Youku

Audience members depart from the Xi’an Olympic Sports Center at the end of the concert Sunday night. Local media reported that around 118,000 people gathered inside and outside the venue for the show. Photo: Xu Luyi/Caixin

Security personnel maintain order at the Xi’an Olympic Sports Center on Sunday. Photo: Xu Luyi/Caixin

Fans gather outside the venue two days prior to the concert on Friday. Tickets for the show soared to exorbitant levels, with local media reporting that front row seats were selling for as much as 2 million yuan ($278,282). Photo: IC Photo

Fans take photos in front of a poster featuring TFBOYS member Wang Yuan at a metro station in Xi’an on Friday. Photo: IC Photo

Advertisements featuring TFBOYS member Wang Junkai show on screens at a railway station in Xi’an on Thursday. The concert led to a significant increase in travel to the city, according to local authorities. Photo: IC Photo

Wang Yuan celebrates his 15th birthday with the rest of TFBOYS in the southwestern metropolis of Chongqing on Nov. 8, 2015. The trio gained immense popularity in China after the group was formed in 2013, when the average age of its members was 12 years old. The three have since gone on to pursue their own solo careers, without officially dissolving the group. Photo: VCG