World financial system, especially regarding wealth, is built up on trust and confidence.
Right now, the perception about China is pretty negative. It doesn't matter what the truth is, or it aligns with perception, what matters is perception. People have zero trust on Chinese economic stats, and their mistrust has been worsened by the stock debacle.
So capital, especially in times of crisis, flocks towards safe havens, like the USD.
Right now, it is flowing out of China into USD, which is putting pressure on foreign reserves. This is the reason why Chinese foreign reserves are decreasing. USD is gaining against all currencies, and is increasing its foothold as the reserve currency in the world.
I was referring to the idiotic claim, that somehow their is depreciation in USD, which is totally false, as it has risen by record numbers against all currencies.