China's shadow banking system of trust companies and insurance companies with trust company units and other informal lenders are the fastest growing part of its banking system. Between 2010 and 2012 trust companies and other shadow banks doubled outstanding loans to 36 trillon yuan ($5.8 trillion) or about 69% of China's GDP, according to J.P. Morgan Chase & Co. Hidden debt that is likely to default in this poorly regulated sector is seen as a large risk in the banking system by the central bank and China's government planners. Tightening of credit by the central bank, the People's Bank of China, sent interbank lending rates from 3% to as high as 25% in late June 2013, finally settling on June 24 at 6.64%. China's state owned banks lend to trust companies in this market. Trust companies get additional financing by selling wealth management products promising investors returns of 8-10%. Even with China's high savings rate and large government reserves, the hidden debt and large unknowns about the loans in default, are seen by the central bank as posing risks to the target rate of economic growth of 7.5% if the government has to bailout a significant number of troubled banks. Much of the money funnelled through the trust companies since 2008 has been poorly invested. The trust companies such as Citic and Ping An Trust channel lending to borrowers for projects ranging from steel mills to infrastructure projects, such as highways and property developments that cannot obtain the financing through the large state owned banks. Fitch Ratings estimate is that since the financial crisis of 2009 these loans generated only one third of the economic growth per yuan as they did before 2009. ...