Wen Hao or Kai...

I got a secondary friend call Wen Kai.He is studying in the same class as me.He also got a twin brother call Wen Hao in the next class which is 4E4.I am in 4E3.They are so alike that not many times I can pin point out who is who correctly.
Today I went to RI and saw one of them.I couldn't tell who is he.But the surprise thing is that,he can recognise me after my so much different from the very last time he saw me.Glasses,body shape and hair......
He worked as TA in RI.Found him when I was looking for Cai Ying Hua.But the problem is is he Wen Hao or Wen Kai? :D
To add on,Wen Hao and Wen Kai are my secondary old friends which I have never met after we graduate.Yah...