"Not sure it is the answer. Just me. Suspicious..."
-I would reckon on paper it's a good match. My own suspicions would be on the quality of the dam engineering: the Chinese tend to set unfeasible time targets and thus cut corners on major infrastructure resulting in what even they call "Tofu Dreg" projects. Inspectors don't want to rock the boat so let things go. Likewise the Chinese are not renowned for good maintainance and this looks like a complex site to service.