It's this one.

It divides China from China.

And it took me two hours to

get through.

This border is weird not only because it separates the same

country into two, but also because it has an expiration date: July 1st 2047.

Until then China has promised to stay out, to let

Hong Kong be highly autonomous.

Hence, the border.

But the government of China

doesn't really want to wait until 2047. They're ready to start erasing this

border now, making Hong Kong a proper part of China and one of the ways

they're doing that is this huge bridge.

Yeah, I know this isn't really the best

shot so here's a solution.

The drone doesn't even have a microphone, but even

still I couldn't help but say, "take a look at this bridge" as it was flying away.

But seriously, take a look at this bridge.

China has unveiled the world's

largest sea crossing bridge.

It's 55 kilometers, that's 34 miles, it's the

longest sea crossing in the world.

The bridge connects Hong Kong with Macau and

mainland China.

I always call this some sort of an umbilical cord between

Hong Kong and China.

That we want something physical for you to register

in your head that Hong Kong is part of China.

So this bridge and a bunch of other recent developments in Hong Kong are

bringing up a lot of questions of what is Hong Kong?

Who does it really belong to?

And what happens when you erase a border?

it's June 4th which is the anniversary of the Tiananmen Square massacre.

There are hundreds of thousands of people here in Tiananmen Square.

In the history of

communist China there has never been anything like this.

On June 4th, 1989,

pro-democracy protesters were marching on Beijing's Tiananmen Square calling

for the end of a single-party rule in China.

They were then brutally massacred,

hundreds were killed.

"The troops have been firing indiscriminately."

Marking the end of any sort of widespread democracy

movement in China.

They've just turned off all the lights in this park.

Every year the residents of Hong Kong hold a vigil to commemorate the people killed

in that massacre.

This is something that's not allowed to mainland China, but

in recent years this vigil has become more personal to these people and that's

because they are feeling a new level of influence from China.

But wait. Isn't hong Kong

already a part of China?

Technically yes, Hong Kong belongs to China but you

sure wouldn't think so by looking at this border that I'm at right now.

Okay, I made it into China.

I mean technically I was already in China, but

now I'm like, really, in China.

So how did it get like this?

Britain and China fought a couple of wars over trade

in the 1800s and Britain eventually took over Hong Kong as a colony.

At the time

this was a mainly empty rocky, group of islands in southern China. Under British rule,

Hong Kong's population and economy exploded and even though Hong Kong's

population was mainly made up of immigrants from China, it became a very

different society than mainland China which was undergoing a communist

revolution.

One of the treaties that China and Britain signed said that Hong Kong

would be a British colony for 99 years, which meant that the agreement

would officially expire in 1997.

As that expiration date drew nearer, China and

Great Britain started to talk about what this is gonna look like.

Britain acknowledges that when the lease runs out in 1997 on most of the territory, the

whole of Hong Kong will revert to China.

Let's finish talking about this stuff up there.

If you go up to the 69th floor in this building in the Chinese border city

of Shenzhen, you'll find a life-size wax sculpture of this moment in the mid '80s

when the leaders from China and Great Britain sat around and negotiated the

terms of handing over Hong Kong to China.

And they came to this agreement that

Britain would give over Hong Kong peacefully to China, under the condition

that Hong Kong would be able to retain its way of life, legal system, their

economic system, freedom of speech freedom of press, freedom of association,

these are fundamental freedoms.

Freedom of religious worship, these are fundamental freedoms.

And they must continue.

China agreed.

They said they would let them be

independent and govern themselves for 50 years while they kind of adjusted to

Chinese rule.

50 years beyond 1997. And so this was the agreement that they came to.

It was called the "One country, two systems" model and it was kind of unprecedented.

Okay, let's head back to Hong Kong see ya Margaret, see ya Deng.

So even after Hong Kong was handed back to China in 1997, this border that I'm now biking to

stuck around.

It remained exactly how it was and this border became highly

symbolic of the fact that

yes, this is China, but it was kind of its own country

at the same time.

Governed with its own values and its own system that is

different than China, that is in opposition to China in some ways.

Perhaps the most overt symbol of Chinese sovereignty is this army barracks behind

me. It's the Chinese army.

And so even though these soldiers can't leave the

barracks or do any sort of enforcement activities within Hong Kong, they're

still here in the central area of the city and they serve as a very powerful

symbol of the fact that this is Chinese territory, this is Chinese sovereignty.

But these soldiers won't be confined for much longer.

The borders around their barracks, as well as this border of north, are quickly

dissolving.

China has committed to respect Hong Kong's autonomy until 2047

and for the first decade after the handover, they respected that promise.

What you have to understand is that Hong Kong was easily China's most

economically productive city.

In the early

'90s right before the handover, this

one city's economy was more than a quarter of the size of China's entire

economy and so it makes sense why China would agree to these terms, to keep Hong

Kong happy and economically free.

But then things changed.

Look at the

explosive development of these Chinese cities in recent years.

These are China's

mega cities.

These cities eventually eclipsed Hong Kong as the economic

powerhouse of China.

Shenzhen, this town that shares the border with Hong Kong, is

a perfect example of this.

The place went from a small fishing village of around

30,000 people to a super productive economic powerhouse of over 10 million

people in just a few decades.

Hong Kong went from making up 27% of Chinese GDP in the early '90s down to

just 3% today.

And suddenly Hong Kong, once the

economic powerhouse of China and the gateway to the West, became much less

economically relevant.

And soon the Chinese government didn't have the same

incentives to respect Hong Kong's autonomy.

So now you begin to see a flood

of Chinese influence in this city.

Let's go see if we can catch the 5 o'clock news.

In recent years the evening news broadcast has started with the national

anthem of China,

playing under a promo video that shows Hong Kongers

enthusiastically participating in traditional Chinese customs.

The message

is very clear: that Hong Kong is a part of China whether they like it or not.

On top of that, the language of the evening news is Mandarin, the official language

of China.

But in Hong Kong they don't speak Mandarin, they speak Cantonese.

Don't they say if you want to kill a city you kill its language first.

And we speak

Cantonese here.

They're actually some professors in Hong Kong and China

telling us that "Oh, Cantonese is actually not our mother tongue,

not Hong Kong's mother tongue."

Cantonese is actually just a dialect of Chinese.

The Chinese government tried to get teachers to use this text

book to teach Hong Kong children the basics about China, but looking into the

book you see that it's more of an advertisement for China's style of

government, than an introduction to it.

The Chinese system is the ideal type.

So multi-party rivalry will makes the people suffer, because about... all these

four points are about how bad the United States is.

Multi-party systems create

government shutdowns. They're basically pointing to that as the reason why a

multi-party system like that of the United States is deeply flawed and

really bad for the people.

In 2014 China took it one step too far.

The Chinese government was trying to control who could run for Hong Kong's election,