China and India are government backed property investment schemes. It’s just a grift to get foreign dollars in and domestic money to stay there.

Here’s one of thousands of videos of people exploring China’s construction bubble and the cardboard (literally) towers: https://youtu.be/XopSDJq6w8E

You can find tons of videos of urban explorers going through these. Just be warned you’ll subsequently be bombarded with ads about foreign real estate after watching one or two.