response to this plague of fraud in Chinese US listed stocks? They intend to make it very difficult for the Big 4 to continue to work in China 'Big Four' auditors brace for big changes in China . In the case of Longtop Financial, Deloites, the firms' auditors have been unable to provide the SEC with any documentation about the collapse for fear of breaking China's state secrecy laws. These frauds are extremely sophisticated and have gone undetected by the large audit firms. They are not just the result of a series of independent events undertaken by similarly dishonest business people acting alone. Rather, a recent report suggests they are part of a systemic network of agents acting inside and outside of China whose main purpose is to perpetuate investment fraud on a scale never seen before in economic history. One of the central players in uncovering Chinese investment fraud research is the firm Muddy Waters who recently published a white paper entitled Frauducation Part I: in this paper the author outlines how Chinese businessmen are taught and sponsored by experts, who sponsor and coach fraudsters in subjects like falsifying records, accounting, assets and  the various methods needed to pull off  grand frauds. When a character like John Paulson gets taken for nearly half a billion there is a lot of motivation on the criminal side to get things right The fraud school's assistance went well beyond providing document and accounting templates. The fraud school provided a network of "friendly"