http://hkmdb.com/db/movies/images.mhtml ... ay_set=eng
There were surely no Ku Feng - Wang Hsieh - Ou-Yang Sha-Fei - Cheng Miu - Chow Lung-Cheung (All not in the credits)
The Movie has only 10 speaking roles at all.

Someone objects if we delete the names not in the credits and not in the movie like Ku Feng?

I don't mind (or we add: Deleted footage?)

Probably due to listings in HKFA entry.

A little research turned up an early Ouyang Shafei's film included a similarly named ???/Swallows Welcome Spring (1943) [added]

I don't mind (or we add: Deleted footage?)

Because we don't know if the actors are in deleted footage or it is simply a mistake in the HKFA entry I think we should delete the names.

Michael Kistner wrote:

I don't mind (or we add: Deleted footage?)

Because we don't know if the actors are in deleted footage or it is simply a mistake in the HKFA entry I think we should delete the names.

Agreed.
Unless there's reason to believe in existence of deleted footage I wouldn't include it. Otherwise, the error becomes compounded and, later, someone cites HKMDB as 'proof'. Sometimes HKFA is wrong too.

Deleted wrong cast.