WinWin is the original NCT 127 member who is now also part of WayV. He debuted with NCT 127 before joining WayV, NCT's China-based sub-unit.
WinWin was included in NCT 127's original seven-member lineup, which debuted in 2016 alongside Taeil, Taeyong, Yuta, Jaehyun, Mark, and Haechan. He later became part of WayV when that unit debuted in January 2019 with the digital EP The Vision.
The question can be confusing because NCT is designed around multiple sub-units, and several artists have appeared in more than one. WinWin is especially notable because his NCT 127 activities and WayV career overlap in the group's broader history. WayV's original lineup also included Kun, Ten, Lucas, Hendery, Xiaojun, and Yangyang. Lucas later left the group, while WinWin remained associated with WayV.