http://www.hkmdb.com/db/movies/view.mhtml?id=15418

I think this must be a reissue of this movie: http://www.hkmdb.com/db/movies/view.mhtml?id=21331
The cast and director match, and if it were really first released in 1956, it would be the first role after a long pause for most of the actors who appear.

THIS biography (archived version) of Han Langen confirms that he did not appear in any films between 1952 and 1957 apart from The Unfinished Comedy. I will merge the two entries from my first post soon.

I copied over the poster from "Sar Kua Chew Aei" but lets leave "Sar Kua Chew Aei" in place just a bit longer until I bring up the "Releases" feature soon. This seems like a great candidate for that.