Asiapol Secret Service aka Asia-Pol (1966)
A Japanese/Chinese co-production with a Japanese director at the helm,this feels more like a 60's Japanese crime film than a Chinese secret agent film.
Also there's too much sentimental goings on for my taste in the Chinese version (seems there's also a different Japanese version where the villain is the lead character).
Not bad though.
I was expecting this to be better than Inter-Pol (1967) (not a co-production btw) but just read that Inter-Pol is supposed to be a lot better so will give that a try next time.
The trailer certainly makes Asia-Pol look good...