I (as HKCM editor) don't know if I'm doing right with this one, but I am too proud (and too childish) to keep this silent.
The 'Lepra King' in Fist and Guts is not Lin Ke Ming but Fung Hak On (nr.2 in the picture). Lin Ke Ming and Jackie Chan (nr. 1 in the picture) are inhabitants of the lepra village.
(I hope the picture hosting works.)

Sorry, but for me and my brother it always looks like Lin Ke Ming on the images and we did not see Jackie Chan and Fung Hak On in that scene.

There are four persons (one is a Jackie fan and one is a FHO-fan) who don't agree with you and your brother.
I will send you the shot I got of Lin Ke Ming in that scene by email, perhaps you will change your mind.

Is credits needed for this movie?

As far as I can read the moviecredits, which are written in Chinese, I don't see the names of Lin Ke Ming, Jackie Chan, Law Keung or Fung Hak On.

The credits on the poster (link on the HKMDB, which looks, except for the missing title, very much like the one on HKCM) have the names of Lin Ke Ming and Law Keung on it, not those of Jackie and FHO. BUT a lot of names on that poster don't show the right characters!
I think the credits on the poster are not reliable.
Why is Lin Ke Ming credited? He only has a small silent cameo, just like Yuen Mao, Jackie and a lot of others. A lot of actors with a speaking role are not credited at all.

The only way to be 100% sure is to ask the actors if they were in that movie or not

For me: I'm sure it are Jackie and Fung Hak On.

Added screenshots with some of the actors:

http://www.hkmdb.com/db/movies/images.mhtml?id=6177&display_set=eng

I think this is Yeung Sai Gwan.


I think this is Jackie Chan.


I think this is Lin Ke Ming.


I think this is Lo Hoi Pang.

That's all.

I think this is Jackie Chan.

If it could be Jackie, this is him to (same person):

If it could be Jackie, this is him to (same person):

You have to be careful with what you say. It's the same role, not the same scene, so, due to the heavy make-up, we can't be sure it's the same person. There's a little change in clothes and make-up.

You missed Fung Hak On, Law Keung and some I couldn't identify.

You have to be careful with what you say. It's the same role, not the same scene, so, due to the heavy make-up, we can't be sure it's the same person. There's a little change in clothes and make-up.

True, I dont even know if it is Jackie but both of them sure look like it, neither of them more or less.

You missed Fung Hak On, Law Keung and some I couldn't identify.

I can complete with more actors gradually

Yes, ofcourse!

Fans will always complain when there's no shot of their stars.

I forgot Yuen Miu. He's next to 'Jackie'.
By the way: Nice shots, good work, keep going!

I think this is Jackie Chan.

I don't think this is Jackie Chan. Jackie was already famous in 1980, he was a rising star - this kind of role could hurt his career.

Why are we talking about Jackie only? Those other three; am I right with those?

By the way: Of those who say, somebody is not the one somebody suggested: is it just because of the picture or have they watched the scene in which they appear very carefully?