Fundamental crux of the issue is that China is simultaneously over-financialized and under-financialized at the same time.
By not having functional capital markets that can effectively allocate capital to firms that need it to expand and fund necessary capital projects; it shoves large household savings into either bank accounts that yield 0% or real estate speculation that has no benefit to the real economy but does make small business development and homeownership prohibitively expensive to new homebuyers; instead of real estate being financialized by being used as collateral for commercial real estate developments, it's now financialized by being used as a pure speculative instrument and
various short-termism leads to either gigantic financial crises (wealth effects, sentiment shocks, capital flight, etc) or kicking the can down the road.
That is in financialized economies like US and UK, which saw their growth all but buzzsawed down by quite minor events that each caused huge waves.
China's strength has always been in its consumer economy, not finance, very much by design. The philosophy of China is that the primary purpose of money is to be spent, not stored. The spending of money in turn causes income growth, lifts QoL and sustains the boom. The whole nation is geared towards pandering to the middle and lower class, this is not out of charity reasons, but simply pragmatism. Wage earners are by far the ones that build the country the most, contribute the most to science, to tech etc.
Having nearly no financialization in the economy is arguably what keeps China booming even as it is entering economy size and productivity levels that has never been reached by any other single country in human history.
The loop of reinvesting money into the wage earning class creates an unbeatable cycle, an engine that lets China move more liquidity than any other country in the world, invest practically unlimited funds on anything it wishes.