I think our legal system needs to be developed. Cases of citizens who are detained and then have to wait much too long for a trial - that is scary, for everyone. When someone commits a crime he needs to be charged quickly. Why does this take so long in many cases? I don't know. Is it because our legal system is still rudimentary? China has promised to modernize its legal system. This has high priority.

I used to ask myself why American universities are financed through endowments. Now I know: During the early days of America, the state was poor and when citizens wanted to set something up, they needed to collect money themselves. Historically, this was different in Europe. There used to be a strong state, a monarch or a king. He provided money.

Many years ago, we were only able to build boxes. Today, architects from all over the world are working with us - Zaha Hadid from London, Gerkan, Marg and Partner from Hamburg, Kengo Kuma from Japan. We brought design and digitalization from abroad to China.

Many Chinese entrepreneurs are now donating for education; others support foundations in health care and research. None of us wants to be the richest guy in the cemetery.

On the one hand the world is getting more integrated and we should not dismiss social values as "Western" when they are actually modern values. On the other hand, individual countries have their own history and their own evolution. Trade unions, for example, don't play the same role in China as they do in Europe or the US.

Investors don't like uncertainty. The market is telling us that they need certainty, they need to see where the economy is heading. If the government is committed to continue the Open Door policy, they will need to come up with concrete policies and execution steps to increase confidence.

When we started out, we didn't really think that the era of great opportunity would end one day. We were much too busy developing our companies. But in today's China you can build a city, even a mega-city like Beijing or Shanghai, within 10 or 15 years. And then you are done. So in real estate development, the Gründerzeit is over. But that is not the case in other sectors.