China's affluent people could become nervous about the value of the currency and try to convert into dollars. Aaron Back of the WSJ poses the question what if the affluent 1-2% of China's urban population of 737 million convert the maximum of $50,000 permitted from yuan into dollars. He says the simple math shows this would result in outflows of around $370 billion to $740 billion. This does not include other ways in which money could exit the country. China's foreign exchange reserves are $3.3 trillon, but this includes illiquid investments such as loans to Venezuela for oil assets, and the Asian Infrastructure Investment Bank. With a large and aging population China has to have reserves to meet social security and other plans for the future. This means the reserves could quickly dwindle with unanticipated capital outflows. This is what keeps central bank PBOC planners focussed on limiting depreciation of the yuan currency.