Without freedom of speech, there is no modern world, just a barbaric one.

Any politician who respects China's government should tell it openly what is in his heart. It is disrespectful to keep quiet about such issues - both vis-a-vis the government and the people concerned.

I think Donald Trump should cool down a little bit. To pay more attention to the history. To really understand what U.S.'s value is about. I think, as a president, those things you always have to ask.

China and the U.S. are two societies with very different attitudes towards opinion and criticism. In China, I am constantly under surveillance. Even my slightest, most innocuous move can - and often is - censored by Chinese authorities.

When you have strict censorship of the internet, young students cannot receive a full education. Their view of the world is imbalanced. There can be no true discussion of the issues.

Now I've come to such a mixed culture: America, Europe, South America, Africa. And the politics are changing everywhere all the time and becoming even more unpredictable. There's no such thing as "fixed" culture. China is also becoming more global. Its problems are becoming international problems, becoming German problems, becoming American problems. Nothing is clear-cut. Perhaps I'll find my way - or get totally lost.

The society was so different [in China] - it was a feudalistic society. It didn't come to a point of industrial revolution until twenty years ago.