What are the jokes about monkeys in a movie in Stephen Chow?

I am a fan of Master Xing, and I can tell you for sure that I am an invincible lucky star.

The film stars Wu Junru and him. Wu Junru plays a woman who picks up garbage, and Chen You plays a handsome boy. As long as the star says you are handsome, he will faint. . . Ha ha! This film belongs to Stephen Chow's early works, when he was promoted by Li Xiuxian.

I also found the dialogue of that joke for you. Here it is. I hope I can satisfy you.

The plane crashed and everyone died except a monkey. Those people grabbed the monkey and asked,

What were the passengers doing before the plane crashed?

The monkey said, Ji Ji

What is the stewardess doing?

The monkey said, Ji Ji

What is the captain doing?

Gigigi

Those people asked again: What were the passengers doing at the moment of the plane crash?

Gigigi

What is the stewardess doing?

Gigigi

What is the captain doing?

Gigigi

Then what are you doing?

Gigigi