Does not surprise me a bit. I don't think that the vast majority of people in the US realize how deeply in debt we are to China. China is the single biggest holder of US treasury Bills, Bonds, and Notes, to the tune of over $895.6 billion of our $14.7 trillion dollar debt. All we can do is pay them interest which approaches $250 billion per year.
In the mean time they keep the value of their Yuan artificially low to encourage the buying of "Made in China" goods increasing our trade deficit. When the US complains the Chinese threaten to sell our debt.
Can't imagine how China is able to develop so quickly