The puzzling nature of Chinese economics has been highlighted by a study showing that all 31 provinces beat the national average growth rate last year. According to the National Bureau of Statistics, China posted an impressive eight per cent growth in gross domestic product, hailed as a beacon of hope in a world dogged by fears of recession. But official returns from local governments, monitored by the financial services agency Bloomberg, show that every one, from Tibet in the south-west to Tianjin in the north-east, beat even that impressive figure. The reliability of Chinese statistics has long been debated by...