Another way people have found to make money is with virtual goods, and sure enough, the bitcoin had a roller-coaster ride last week. The e-currency soared in value to more than 8,800 yuan per coin during trade on January 5th before retreating to around 6,000 yuan the next day. The price dropped even more this week as the Shanghai headquarters of the People’s Bank of China announced it has conducted onsite inspections of local bitcoin trading platforms. What’s behind the PBOC’s moves? Mi Jiayi reports