NCT 127 have launched their fifth headlining tour, 'Neo City: The Redline', with a sold-out three-night run in Seoul from 18–20 September that celebrated the group's 10th anniversary. The South Korean boy band performed before approximately 31,500 fans across the three shows at KSPO Dome in Olympic Park, with tickets selling out completely, including restricted-view seats. The tour holds particular significance as NCT 127 has become one of K-pop's most commercially successful acts in the United States, marking a decade since their 2016 debut.

The group delivered elaborate staging throughout the performance, featuring members descending on wires during the opening track "Legacy," a boxing-ring-inspired setup for "Punch," and an onstage arrival via vehicle for "Piñata." Band leader Taeyong unveiled a newly written rap verse for the fan-favourite "Cherry Bomb," whilst the set included a medley of previous hits interwoven with tracks from their latest album. NCT 127 have established themselves as one of K-pop's leading acts commercially, achieving three albums in the Billboard 200 top five—Neo Zone (2020), Sticker (2021), and 2 Baddies (2022)—with their most recent album Walk debuting at number three in 2024. The 'Neo City: The Redline' tour will continue throughout Asia until January 2027, visiting Jakarta, Hong Kong, Singapore, Saitama, Bangkok, Manila, Taipei and Kuala Lumpur.