So you can't disprove a reasonable inference.
LOL!! Caught you in another mistake. If you think buying foreign currency (there is more than one currency, by the way) is the same as buying U.S. Treasuries, then you're sillier than I previously thought.
If you want to infer how much they buy in Treasuries, a good starting point might be an article about their purchases of U.S. Treasuries.
But then again, you always confuse their total foreign reserve holdings for U.S. dollar holdings. You could find an article that tells you how much they buy and you still wouldn't understand it.