Most collectors know the pirate originals: Super Mario World, Donkey Kong Country, Boogerman, Sonic the Hedgehog, etc. But most collectors don't have a clue what Pao Ching Tien is. Well, it's one of those few pirate originals that was never intended for a market beyond China.
Presumably, Pao Ching Tien is the name of some Chinese historical figure, at least that's the impression you get when the game starts up. The game is simple, with this guy and his sword whacking enemies in a platformer. It's nothing exciting, but is a gem for anyone who seriously collects pirate originals.
No one is looking for this game, and most people simply don't know it exists. It's very hard to find, but will sell cheap. You shouldn't pay much more than $10 for the game.