"Beijing committed to a coal capacity cap of 1,100GW — which is still a sizeable increase on the 920GW capacity the country currently has.
But the number of coal power projects in the pipeline would have taken that figure to 1250GW.
Hence this raft of suspensions.
In the last year China has grappled with a coal overcapacity crisis, and has taken a number of steps and introduced several policies designed to tackle it."
from the link in the OP
maybe their economy is slowing down