homework

OK,here is something I found about China.
1.After World War II, the Communist Party of China under MAO Zedong established an autocratic socialist system that, while ensuring China's sovereignty, imposed strict controls over everyday life and cost the lives of tens of millions of people.
I don't know where does this number"ten of millions of people" from, but the thing i learned in China was much less than that, and the population was not increasing at that time.

2.total: 22,457 km

border countries (14): Afghanistan 91 km, Bhutan 477 km, Burma 2,129 km, India 2,659 km, Kazakhstan 1,765 km, North Korea 1,352 km, Kyrgyzstan 1,063 km, Laos 475 km, Mongolia 4,630 km, Nepal 1,389 km, Pakistan 438 km, Russia (northeast) 4,133 km, Russia (northwest) 46 km, Tajikistan 477 km, Vietnam 1,297 km

regional border(s) (2): Hong Kong 33 km, Macau 3 km

the other thing is that we believe Hong Kong and Macau are all part of China, just like other provinces such as Jiangsu. But I don't know why there are some special team called "Hong Kong" and "Macau". the area of Hong Kong and Macau are also included in the area of China.

3.PITCAIRN ISLANDS only have 50 people?

ok other funny things i found is pitcairn island only has 50 people. and their nation is near Australia but not  border on Australia. if the people there are ill or want to do some shopping. Do they have to ship to Australia, and what will be the RNI

of that nation?

4.india has 1281935911 people and it only has one third area to china?

everybody in china think china is a crowded country because we have the biggest population in china,and the population of india is becoming closer to China, and the area is not that big. If the number keeps increasing, what will happen to the country? like some one said if there are 15 billion people in the world everyonr will died. than if the population of india is increasing fast, will something happen to it?

5.vatican city has an area of less than 1 square meters?

ok, China has the fifth biggest area in the world and there is a square called tian'an men square in beijing,the capital of china. Vatican city is even less than one fourth of tian'an men square! how can this possible?