Directed by Hung Min Chen, Mars Men (aka Huo xing ren) is a bizarre sci-fi movie whose creation is almost as weird as the film itself!
http://www.youtube.com/watch?v=K3RbaHZjS8c
In April 1974 Thai Burin Films (a subsidiary of Productions Chaiyo) and the Japanese company Tsuburaya Productions released the movie Giant and Jumbo A in Thailand only. The film featured the Japanese tv superhero Jumborg Ace. Then in 1976 the footage was taken by a Taiwanese production company, and completely reworked (law suits would follow). All that was left was 32 minutes of fight scenes between monsters, heroes and giants along with a brand new plot and new actors. An additional 50 minutes of footage was then filmed and edited together with the above to make the final product!
http://www.youtube.com/watch?v=OrtqoCp85u4
What we are left is an Ultraman like plot where Martians issue an ultimatum to the earthlings, whilst a young kid accidentally finds an ancient stone statuette buried in a cave that helps transform him into a giant superhero that can defat the Martians!

More Stories
All Summer in a Day (1982)
Satan’s Triangle (1975)
Waxwork 2: Lost In Time (1992)