To save the cities in the upstreams, China opened 13 sluice gates of the Three Gorges Dam for full discharge.
This caused severe floods & mass destruction in the downstream regions.
To its cities cities, China deliberatly left millions to drown!
Take all the High Speed Rail in the world, outside China, double it; China still has more.
If you think China's economy isn't stellar, then you don't understand China.