a secret restaurant in Madrid.

- [Male] Oh, yes, tapas.

- [Narrator] No, we are here for Chinese treats.

- [Male] Whoa, whoa, whoa.

How did we get down here again?

- [Narrator] Buckle up.

That's a long story.

It all started when we got a tip saying Madrid had this

secret Chinese restaurant.

The most authentic food ever, but very hard to find.

- [Male] Let's go.

- [Narrator] There was no email, no proper address.

All reviews pointed to a mysterious underground location.

We called the one number available.

No response.

- [Male] Oh, what a shame.

- [Narrator] No, wait.

We didn't give up that easily.

We got a friend in Madrid to get to the bottom of it,

and she got us the right directions.

- [Male] Good thinking.

- I got it.

I got it.

There are no signs, so follow these steps.

- [Narrator] We got to Madrid and followed the very

detailed instructions.

Take notes people.

Go to Plaza de España.

- [Male] Check.

- [Narrator] Get to the southeast corner.

- [Male] Check.

- [Narrator] Find the parking lot entrance.

Go down the stairs.

- [Male] Double check.

Oh, look a sign for the restaurant.

- [Narrator] Remember, there are no signs.

- [Male] Oh, yeah, I forgot.

- [Narrator] Go down more stairs,

go through the corridor.

Walk a bit.

- [Male] Whoa, whoa, whoa, wait.

I think that's it.

- [Narrator] And that's how you find Cafetería Yulong Zhou,

better known as,

- [Narrator] Everyone meet Yulong Zhou and Liufeng Zhu.

- [Narrator] And these two serve some of the most genuine

Chinese food in Spain.

- [Male] Mmmmm that looks so good.

- [Narrator] These delicacies are not just your

average Chinese dumplings,

they're from the couple's hometown Qingtang,

in the surrounding province Zhejiang,

in South Eastern China.

It's actually where the majority of Madrid's

Chinese population is from.

- [Narrator] Like, really like it.

For a restaurant that was this hard to find,

it seems like this place never stops going.

- [Narrator] You got to tell us who does your marketing.

- [Male] Ahh, come on mate.

What about one for us?

- [Narrator] We'll take that as a maybe.

Ah, that was totally worth the trouble.

- [Male] Please can we stop filming now.

I am really hungry.