OK, I see.

I also agree with your opinion, so I will do option 1 later, which is just a little different from the data now.

For these southeast islands/reefs, it's true that there isn't a line on "claim", but I also have almost not found any material in other languages about Vietnam's claims to individual islands near Malaysia separately (including no mention of Vietnam's claims in Wikipedia in other languages). Of course if you are quite sure, then just keep it.