Sure but China inflated its currency, that's a redistribution to asset holders. The acomplishments are admirable all the same, but the accelerated climb is probably boosted by inflation. I predict a correction in next year's list.
https://medium.com/@b.essiambre/the-world-deserves-a-pay-rai...
There is no reason for a correction if they continue running a sufficiently inflationary monetary policy.
Where I depart is: wages adjust much more slowly than assets. Wages are negotiated over long spans of time vs. liquid assets. Wage holders think they're negotiating for real value X but it's eroded. Just look at baby boomers. Their wage flows are ~ fixed. Sure many get the benefit of asset appreciation but the ones that don't (get word) are crushed.
Europe and Japan are still very problematic however.
The simple fact that people, businesses and banks hoard cash and government bonds instead of doing sufficient investment to keep people employed is strong evidence to me that the returns on government paper is above market. Excess reserves are high into these parts of the world.
A more widely recognized sign is that they keep undershooting their inflation target.
For arguments from real economists, look around these parts https://www.davidbeckworth.com/popular, https://worthwhile.typepad.com/worthwhile_canadian_initi/nic... or https://faculty.insead.edu/fatas/
One thing you can't rely on is the fact that central bank rates are zero in the problematic places. Zero is a high, above market rate when the equilibrium is negative. As I tried to emphasize in my medium post, negative rates can be quite normal and natural. If marginal private assets don't have a positive real rate on a risk adjusted, liquidity adjusted basis, the government shouldn't provide an artificial substitute. If they do, it puts a gridlock in large parts of the economy.
China inflated the value of its currency, they didn't inflate it by printing more (quite the opposite actually). This makes it harder for Chinese companies to do trade, not easier, so I don't see what your point is.
However, if the RMB is overvalued (meaning they say it is worth more than it is actually), then capital controls are very necessary. If the RMB was undervalued, then you would need more controls in the opposite direction (for money coming in) to prevent arbitrage.
Right now the RMB is overvalued, but not by much. Maybe it should be 7 or 7.5 RMB/dollar.