: If it refers to the 2021 web story or a specific technical standard, mention its origin.
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The significance of SONE-127 2021 can be understood from several perspectives: : If it refers to the 2021 web
titled "NCT 127 WORLD TOUR ‘NEO CITY : SEOUL – THE LINK’" in December 2021, marking their return to large-scale solo concerts since the pandemic began. 2021 served as a turning point where SONE-127 2021