Why do Stephen Chow, Ng Man Tat and Luo Jiaying spoof a Chinese Odyssey?

That's a script written by Liu Zhenwei, which is Giambi. It has almost nothing to do with several leading actors. Stephen Chow added something of his own.

Hong Kong always likes to make fun of things that people are familiar with or unfamiliar with. This is not a spoof, let alone Stephen Chow and others.