China's total debt is about 250% of GDP, compared to over 300% for the United States [1]. It's more useful to observe total debt since lots of debt the Chinese government will ultimately have to assume, in one form (e.g. financially) or another (e.g. political turmoil), is not held on the government balance sheet, e.g. debt issued by its banks or critical employers or regional governments. Most American debt, on the other hand, is issued by relatively-well regulated banks and by the federal government.

[1] https://www.theguardian.com/business/2016/jun/16/chinas-debt...