I am more interested to know how you cut up the actual content. A user from Japan liked a video from an American user a year ago, what happens to that? Are the

I am more interested to know how you cut up the actual content. A user from Japan liked a video from an American user a year ago, what happens to that? Are the users still on the same tiktok shard? Do we somehow remove all foreign interaction from the American shard? Do users from Canada get to choose which shard to go with?