Some are missing. No one deserves that. Pray for them.
This bespeaks criminal corruption. This cannot happen to properly constructed buildings and the Chinese know how to build properly. Builders bribe officials to cut corners, and this is the result. My guess is that the buildings did not have proper pilings and rotated as they settled. This is murder.
If you watch the video, you’ll notice there is NO rebar in the buildings. Masonry crumbles very easily without rebar and prestressing to keep it in compression. The Chinese build most of their buildings very cheaply without any steel reinforcement.