Prices hit lowest point in at least two decades.
Price-to-income ratio stuck at very high 21.
In Shanghai second-hand homes around 8,000 USD per square meter.
Big cities like Beijing saw prices drop sharply from 2018 peaks.
70-80% of Chinese household wealth tied to property.
Estimated $18 trillion in wealth destroyed.
High homeownership rate over 90% means many families hit hard.
Construction and related exports also affected.