Mark Zuckerberg recently announced that he will donate $45 billion of his wealth to philanthropy. Two years ago, my husband and I decided to endow $100 million to set up the SOHO China Scholars. This program will give financial aid to Chinese students so they can attend the best universities in the world.

Our company has only been active in Beijing and Shanghai, two very market-dominated cities. This was an advantage. Land is purchased here in public auctions, in a transparent way. When you do real estate development outside Beijing and Shanghai it is good to have "guanxi" - good relations within the local government.

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.

It's a good thing that it is getting simpler to register a company in China, it is good that the exchange rate of our currency is getting more flexible and that it's getting easier for Chinese businesspeople to travel. All of this opens up our economy.

The question is not about whether it will work or not. It's how quickly we can pull it off. Structural change will happen. When economies grow, there comes a time when you cannot rely on investment alone. We had that. The return on investment is becoming less and less. So we have to change. The old model doesn't work anymore. It's a question of speed.

Mark Zuckerberg recently announced that he will donate $45 billion of his wealth to philanthropy. Two years ago, my husband and I decided to endow $100 million to set up the SOHO China Scholars. This program will give financial aid to Chinese students so they can attend the best universities in the world.

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.