Then you do not understand the Chinese economy. Yes China debt is very high but the debt is differant fron the USA. China debt is mostly domestic, banks, local goverments property market and based on the Yuan(china mostly borrows in Yuan) and can be controlled by the goverment decisions are fast unlike usa who have trouble passing budgets.
USA debt is dollar based and part of the global system, if yields spike, debt service costs go up, treasury demand drops the dollar slides. Need to look at what the debt is funding as well for both countries. USA debt is war, tax cuts for the rich, stock buybacks and social debt. China is infrastructure, industrial, R&D and property market