In our DB we have 2 Woo Wai's with the same Chinese name - ?? - according to their filmographies, they worked as actors at the same years. If we have to add Woo Wai to the cast list of a movie, without having a copy of the movie, how do we know, which one to add?

Woo Wai (2) was a HK actor that only appeared in a few Taiwanese movies.
Woo Wai (3) was a Taiwanese actor that only appeared in a few HK movies.

So, if you are adding data to a HK movie, there is a 95% chance to be (2)
And viceversa.

Of course, I am sure that both filmographies have a few incorrect movies now.