Shanghai was occupied by Portugal

This is the greatest joke that I have ever heard in my life.

Today, a student asked me the relationsip between those colonies and their motherlands,

and the following is the conversation:

I: Hong Kong?
He: Has ever Hong Kong been colonised?

I: Macau?
He: Where is Macau?

I: Taiwan?
He: A part of People's Republic of China, right?
(Indeed, I can't say that he's wrong, but anyway, Taiwan has never been ruled by PRC.)

I: Vietnam?
He: Hanoi.
(Com'on, I am asking you the "motherland", rather than the capital.)

I: Okay, then, give me an example that you know.
He: Shanghai was colonized by Portugal.

Gosh!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

KILL ME IMMEDIATELY.

If Shanghai had ever been occupied by Portugal, Japan would have been the winner of WWII.

Why don't you tell me that the capital of Japan locates in Beijing or Washington is the Father of the Russian Federation?

Anyone helps me?