"Hear that sound?" said Andy Xie while cupping his ear. "That’s the sound of China's real estate bubble bursting.”

Beijing, China

Xie, a former Morgan Stanley star economist and one of the more vocal China bears, was telling me that Armageddon had arrived. Housing prices were going to drop 50 percent, maybe even 90 percent. Xie and I were debating on CNBC last September in a China "Bull vs. Bear" showdown hosted by Bernie Lo. You can see the three segments here: Bull vs Bear: China property debate 1 / Will China's property bubble burst?/China's growth story