It's tradition. AlsoDoes it have to be the Yellow River? Because the 3 Gorges Dam on the Yangtze has been on constant life support from the moment it was finalized and that shit constantly leaks. Even a mild crack would be enough to classify as "Lost Mandate".
If the dams break, then the UN will rush to prop up the CCP and gun down any rebels for them.If the dam breaks the ccp breaks with it the cost in human life would allow now other option