Well China is building up its inefficiencies even as it makes other advances. They created quite a few time bombs for themselves.

1. They have set themselves up massive health time-bombs with their pollution and ineffective regulations. Not to mention prevalence of smoking. 2. China's Social Credit plan is creating a turn-key rebellion as the newly created lower caste has nothing to lose but their chains and the high social credit scores means they have a purge list for when bloody repression begets bloody revolution. 3. They have enough people laundering money for 'emergency escape hatches for when they fall out of favor' that they are blowing up real estate prices internationally in major cities. Optimistically it could just be fallacious beliefs that real estate is a foolproof investment but that doesn't make things much better. 4. The party leadership flat out know that they cannot survive a recession and try to prop things up constantly.

They may be the most viable example but they are still vulnerable to collapses - not a guarantee by any means but there is definite precedent.