I would wonder first if the populated areas were really populated. Are they even built out? Are there even real kitchens, bathrooms, walls inside? My second question is, were there really 400 million Chinese people that recently died. I was in Junior High (now Middle School) in the 80's, and I remember hearing then about the one child policy in China. How are there even women around for men to marry? You know they killed their first born if it was a girl. So that's a good reason marriages are down. I bet Chinese women are hard to come by, and they make it look in videos like they are equal in population. Nope. Men have no incentive to do anything without women around. A society that is in collapse, and it's not because of covid.