Meanwhile:
Chinese businesses are hoarding dollars because they expect their own currency to weaken, and that in turn is exacerbating a slide in the yuan that has been driven by wobbly stock markets and feeble growth in the world’s second largest economy.
This feedback loop has been playing out for months in mainland currency markets, spurred on by the dollar’s rising yield. Foreign exchange deposits have climbed $53.7 billion since September to $832.6 billion, People’s Bank of China (PBOC) data shows.
Seems more likely to me that the Chinese government is being forced to reduce its dollar holdings in order to prop up the renminbi against all those Chinese people hoarding US dollars.