how could yuan be a reserve currency when its not even legal for its citizens to move it out of the country beyond $50k a year. they have extreme currency controls
Most central banks in the world hold their USD reserve in the Federal Reserve. There's no need at all for a the currency to be exportable, for it to function as a reserve currency.
Do you actually believe that the Central Bank of India is hauling Benjamins in wheelbarrow through the Delhi international?