According to the news, what is the main reason for China’s rapid economic growth?

China’s rapid economic growth in recent years has to a large extent been fuelled by business investment in new factories and other commercial premises, many of them producing low-cost manufactured goods. The new figures underline the extent to which that process is continuing. The worry is that it might just be happening too fast. With very high levels of investment there is more risk that some projects might turn out to be unprofitable and lead to business failures, job losses and perhaps serious problems for the banks which have lent money to finance the investment. A senior official in the Chinese central bank said they will, as he put it, "remove fuel from the fire", to reduce the risk. The idea is to constrain commercial banks’ lending. Banks that lend too much may be required to buy low interest financial assets, reducing the amount they have available to lend to business.