NCT marks its 10th anniversary as the largest experiment in K-POP multi-member idol groups. Starting with the name 'Neo Culture Technology,' NCT introduced an 'infinite expansion' structure that expands the brand through member combinations and units rather than a fixed team composition. The group operates through various units including NCT U, 127, Dream, WayV, and Wish, continuously expanding its reach. Initially, fans found the complex system challenging, but the COVID-19 pandemic changed the landscape. As offline performances were restricted, YouTube and in-house content consumption increased, making multiple members and diverse combinations an advantage rather than a drawback. The photo card collection trend and album unboxing videos, particularly 'NCT Album Unboxing Vlogs,' dominated YouTube algorithms. The regular 2nd album 'Resonance' series released in 2021 achieved double-platinum status with Part 1 selling approximately 1.46 million copies and Part 2 with approximately 1.21 million copies. NCT is now recognized as a successful case demonstrating SM Entertainment's 30 years of accumulated expertise through its unique system of openness and expandability.