And maybe that's how the problems with China end?

Pandemics aren't great for birth rates, it would seem:

The number of newborn babies in China registered with the police fell by double digits last year, a sign that the birthrate is continuing to decline and worsening demographic pressures in the rapidly aging nation.

There were a total of 10.04 million babies registered with the government in 2020, 14.8% lower than in 2019, according to data released by the Ministry of Public Security on Monday.

Haven't I read that birth rates in Western countries have dropped off last year as well, even though some early thoughts were that bored couples in lockdown would resort to sex to pass the time?   Yes -  I have read that.  Perhaps they didn't take into account the dis-incentivising effect of being in lockdown with children you already have?    

Back to China:  how big is the expected demographic decline, even without COVID assistance?  Very big:

The population of China is projected to decline from 1.4 billion in 2017 to 732 million by 2100, a drop of 48%, according to a new report published in the medical journal The Lancet and authored by University of Washington School of Medicine Professor Stein Emil Vollset and 23 coauthors. The number of people of working age in China is expected to plummet. The report forecasts a decline of 64% for China's population aged 20–24 years. That is the prime age for a country’s military, the authors note.