At 00:00 on December 16th, SMTOWN's official website unveiled Super Junior and Girls' Generation Oh! The return trailer of the GG squad has triggered a heated discussion among netizens.

In the teaser, Super Junior and Girls' Generation Oh! GG uses different concepts of tram carriages as a background, attracting netizens in the form of colorful charm. In the public Super Junior teaser photo, eight members of Yin Hyuk, Gui Xian, DongHae, Li Te, Prodigy, Shi Yuan, Li Xu, and YiSheng are integrated.
Announced Girls' Generation Squad OH! In the GG Winter Return trailer photo, Kim Tae-yeon, Lim Yoon-er, Lee Soon-gyu, Kim Hyo-won, and Kwon Yoo-ri appeared in different styles of clothing, and SMTOWN also announced the makeup photos of the members.
OH! GG, a small group launched by the Korean girl singing group Girls' Generation in 2018, is composed of the remaining five members of SM who announced the renewal of their contracts, Kim Tae-yeon, Lim Yoon-geol, Lee Soon-gyu, Kim Hyo-won, and Kwon Yoo-lee.
It is reported that SMTOWN launched the "SMCU EXPRESS" theme concert with the concept of "SMTOWN 2022", which was named "Metaversal Origin Story" Lee by producer Li Xiuman based on "SMCU (SM Culture Universe)" and co-named with producer Sooman.
SMTOWN Entertainment Concert will be held on January 1 next year, An Qixuan, Bao'er, Tojin, SuperJunior, Girls' Generation-Oh! GG, SHINee, EXO, Red Velvet, NCT, aespa, DJs will be on the stage!
"2021 Winter SM Town: SMCU Express," which will be released on January 27, is SM's first SM Town winter album in 10 years since 2011.
Girls' Generation -Oh! After the GG squad winter special return trailer photo was exposed, netizens directly called "the life", "grandpa back to Qingqing", "full of memories".