One possible version:

  Hello, everyone. Welcome to China. First I want to give a brief introduction to China.  Beijing is the

capital of China, but the biggest Chinese city is Shanghai. It has the highest building in China-the TV

station of Shanghai. At the top of the TV station you can look at the whole city.  If you want to see old

buildings, you can go to Beijing and you will see the Great Wall, the Palace Museum, Beijing Hutong and

so on. You can also see other sights, for example Qomolangma, Mount tai, the Three Gorges. . .

(答案不唯一)