>> wang shi: i think. maybe. >> stahl: you may be? >> wang: yes. only the quantity, not quality. >> stahl: wang shi is modest, but his company, vanke, is a multi-billion-dollar real estate empire, building more homes than anyone in china. he was born on the frontlines of communism and joined the red army. but he secretly read forbidden books about capitalism, so that when china liberalized its economy, he rushed to the frontlines of the free market. even he thinks today's situation is out of control. are homes in china too expensive today? >> wang: yeah. >> stahl: here's a number that i saw. a typical apartment in shanghai costs about 45 times the averagd resident's annual salary. >> wang: even higher, even higher. >> stahl: what does that mean for your economy if it's just too expensive for the vast majority of people to buy? >> wang: i think that dangerous. >> stahl: dangerous. >> wang: that's the bubble, so i think that's the problem. >> stahl: is there a bubble? >> wang: yes, of course. >> stahl: there is a bubble, and the issue is will it burs