In South America) But seriously, I wrote to them, and there was no response. If they want to participate, they will sign up; if not, they won't.

Added after 10 hours 24 minutes
Information for those who will be coordinating with the Vietnamese team.

Sir from Vietnam can play at 15:00-18:00 MSK on Saturday.
Dan Choi from Vietnam can play at 4:00 - 18:00 MSK on Sunday.

Sir can play in the evening on Saturday (+4 hours from Moscow time) or in the morning on Sunday.
Dan Choi can play from noon on Saturday or all day on Sunday. On other days, it varies.