Hong Kong, officially the Hong Kong Special Administrative Region of the People's Republic of China, is an autonomous territory south to Mainland China and east to Macao in East Asia. With around 7.2 million Hong Kongers of various nationalities in a territory of 1,104 km, Hong Kong is the world's fourth most densely populated country or territory. 

Hong Kong used to be a British colony with the perpetual cession of Hong Kong Island from the Qing Empire after the First Opium War (1839–1842). The colony expanded to the Kowloon Peninsula in 1860 and acquired a 99-year lease of the New Territories from 1898. Hong Kong was later occupied by Japan during the Second World War until British control resumed in 1945. The Sino-British Joint Declaration signed between the United Kingdom and China in 1984 paved way for the transfer of sovereignty of Hong Kong in 1997, when it became a special administrative region (SAR) of the People's Republic of China with a high degree of autonomy. 

Under the principle of "one country, two systems", Hong Kong maintains a separate political and economic system from China. Except in military defence and foreign affairs, Hong Kong maintains its independent executive, legislative and judiciary powers. In addition, Hong Kong develops relations directly with foreign states and international organisations in a broad range of "appropriate fields". Hong Kong involves in international organizations, such as the Asia-Pacific Economic Cooperation (APEC) and the World Trade Organization (WOR), actively and independently.
What is this article about?
What is that?
What country is it closely tied to?
Where is Hong Kong located?
What other country is it east of?
How many people live there?
In what size area?
With so many people how is Hong Kong ranked in populated areas?
What does it share with China?
What does it have separate?
Does it share executive powers?
Is Hong Kong involved in any international groups?
Can you name one?
What does that stand for?
Can you name another?
Are they involved with China in these groups?
What was Hong Kong before it was a country?
For what country?
Did it ever grow?
When?
Hong Kong
Hong Kong
country
Hong Kong is the world's fourth most densely populated country or territory
China
autonomous territory south to Mainland China 
south to Mainland China
erritory south to Mainland China
Macao
east to Macao in East Asia.
7.2 million
With around 7.2 million Hong Kongers 
1,104 km
territory of 1,104 km
fourth most densely populated
Hong Kong is the world's fourth most densely populated 
military defence
 Except in military defence and foreign affairs
political and economic system
Hong Kong maintains a separate political and economic system 
no
Hong Kong maintains its independent executive, legislative and judiciary powers. 
yes
, Hong Kong develops relations directly with foreign states and international organisations
APEC
Hong Kong involves in international organizations, such as the Asia-Pacific Economic Cooperation (APEC
Asia-Pacific Economic Cooperation
Asia-Pacific Economic Cooperation 
World Trade Organization
World Trade Organization
no
such as the Asia-Pacific Economic Cooperation (APEC) and the World Trade Organization (WOR), actively and independently
colony
Hong Kong used to be a British colony
Britian
Hong Kong used to be a British colony 
yes
he colony expanded to the Kowloon Peninsula in 1860 
1860
The colony expanded to the Kowloon Peninsula in 1860