Roving Swordsman questions

The Celestial DVD case claims that ROVING SWORDSMAN was made in 1980, which surprised me as it felt more like the slightly tired efforts Chor Yuen was producing a few years later - popping over to HKMDB I noticed that it's listed as being from 1983. This makes much more sense to me - apart from anything else, it would explain why Ti Lung was looking a bit old in the film (that man really did age fast when it caught up on him - he looks 10 years older still in A BETTER TOMORROW).
Also, the on-screen credits listed the writer for the film as Huang Ching I think - which I thought might be Wong Jing. HKMDB has the writer as Chun Yue (3), aka Chin Yu. Anybody have more info?
HKMDB also mentions Wong Pau Gei as co-action director, but I only saw Tong Gaai in the credits (I didn't study the credits properly though).
Also, the on-screen credits listed the writer for the film as Huang Ching I think - which I thought might be Wong Jing. HKMDB has the writer as Chun Yue (3), aka Chin Yu. Anybody have more info?
HKMDB also mentions Wong Pau Gei as co-action director, but I only saw Tong Gaai in the credits (I didn't study the credits properly though).