But more importantly, is the unique academic path and rich overseas inspection experience he has had in these twenty years. "I have been to more than forty countries, and the key is that I focus on developing countries," said Wen TiJun in a low tone with a slight Beijing accent, "I am one of the first people in China who went to the large slums in developing countries for investigation, so in recent years I have continuously called for caution in relevant policy level discussions: there is no single large developing country with population exceeding 100 million that has successfully urbanized, all have created large slums, which are the roots of social unrest, places where prostitution, gambling and drugs spread, places controlled by the mafia, and places where regular police and rule-of-law society cannot be established. Therefore, China must be vigilant, we cannot follow other developing countries in accelerating the process of urbanization through large slums."