Looks like the same person:

http://hkmdb.com/db/people/view.mhtml?i ... ay_set=eng

and

http://hkmdb.com/db/people/view.mhtml?i ... ay_set=eng

Someone objects if I merge the two names?

Is it just estimated or any hint or proof? Actually who knows where the ID Bi Un came from?

I will investigate Chinese language sources on this. This might be hard to prove.

Actually who knows where the ID Bi Un came from?

The Bi Un ID looks trustworthy because the name 飛雲 is listed early on all 3 movies (see the posters) with that actor and he is always one of the main villains.

Is it just estimated or any hint or proof?

Toby Russell wrote me that he thinks it looks like the same person. I checked a few movies and agree that it LOOKS like the same person. If you want you can check a few movies, I guess many are on youtube.

?? should be an alias.