阅读短文，判断句子的正确或错误。

China is a big country. There are lots of things to see. From east to west, you can see many long rivers and high mountains. There are also many big lakes. In winter it is warm in the south.

But it is cold in the north. You can play with snow in the north and you can go swimming in the south. Beijing is the capital of China. You can visit the Great Wall there. It's about twenty thousand kilometres long. People here are very friendly. Do you want to visit China?