Zimbabwe and China

Seems like China has had enough of Mr. Mugabes “reforms” in Zimbabwe.

“China in the past provided substantial development assistance but owing to the dramatic currency revaluations and rapid deterioration of economic conditions, the economic outcomes of these projects have not been so good.”

And what pray tell has caused the dramatic currency revaluations and rapid deterioration of economic conditions in Zimbabwe??
Could it be due to a dictatorship, socialism, communist land grabbing??