In 2017, BTS were chosen as the honorary tourism ambassadors for Seoul as part of the 'I Seoul U' programme. The group filmed an advertisement produced by the Seoul Metropolitan Government, which was subsequently aired in over 100 countries. On December 6, the promotional song, "With Seoul" was released online with the music video released on December 13. They were also chosen as the new brand Models for Lotte Duty Free Shop. BTS collaborated with popular Korean communication app LINE, creating LINE 'characters' BT21 that serve as emojis and stickers. These characters represent the members of BTS: RJ representing Jin, Shooky representing Suga, Mang representing J-Hope, Koya representing RM, Chimmy representing Jimin, Tata representing V, Cooky representing Jungkook, and Van representing ARMY.
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