They are all very impressive. The IPhO gold medalist must be outstanding. I remember that over ten years ago, almost everyone who made it into the national training team could win a gold at IOI. However, competition level and future achievements don't necessarily correlate directly. But upon closer look, this was from the 13年 (2013) competition. When I was competing, Jeff was still in elementary school? He's really become an old legend! Others have already taken off, and I'm still here just making empty comments. I need to work harder.