Since China carefully controls access to information, that's functionally impossible but traditionally corruption by party officials in China was notorious and wide spread. China's only recently been able to tackle it, partially thru advances in technology, but the true extent of their success is difficult to gauge. Critics have also argued that eliminating rivals and ensuring loyalty was the true purpose of anti-coruption efforts. It's suspected that Xi Jinping's extended family has amassed a hidden fortune of around a Billion Dollars.