One evening early this year, a red Ferrari pulled up at the U.S. ambassador's residence in Beijing, and the son of one of China's top leaders stepped out, dressed in a tuxedo.

Bo Guagua, 23, was expected. He had a dinner appointment with a daughter of the then-ambassador, Jon Huntsman.

The car, though, was a surprise. The driver's father, Bo Xilai, was in the midst of a controversial campaign to revive the spirit of Mao Zedong through mass renditions of old revolutionary anthems, known as "red singing." He had ordered students and officials to work stints on farms to reconnect with the countryside. His son, meanwhile, was driving a car worth hundreds of thousands of dollars and as red as the Chinese flag, in a country where the average household income last year was about $3,300.