the photo seems to be from Yunho’s web drama last filming day at Cheongdam late June, a different photo was previously shared by a staff member here.

Partial Translation:

Taken during summer
Web drama ‘I Order You’~
That day, after the filming ended, the after-party was held, and everyone was excited.
U-Know Yunho has enlisted…
it was impressive to see many chinese fans

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Credits:

벨루카,
Translated by @tvxq_et_moi,
Shared by TVXQ! Express