The State Administration of Foreign Exchange, the agency which looks after China's $1 trillion-plus in foreign exchange reserves, has begun advertising for trading staff to invest the funds, the Financial Times reported. In advertisements placed at important Chinese universities at the end of last month, the agency said it was looking for 30 new staff, including 15 dedicated exclusively to trading and research. The advertisement says the agency will be operating four trading departments, increased from the two listed on the agency's website at the end of last year. The recruitment drive coincides with a rapid build-up in reserves and increasing pressure on Chinese authorities to maintain the value of the funds given the fall in the value of the US dollar. About 70% of the reserves are believed to be held in US dollars, although the precise amount is a state secret.