All conven iences have come in data-collection of anti-corruption in this new era of big data, with areas enlarged, costs reduced, and integration of micro information made much easier. But there have come together with the conveniences the barriers of redundancy of the sum total of information, difficulty in distinguishing true information from the false, loss of individ-ualization in date collection, and the liability to interfere with the legitimate interests of the public. In order to deal with these obstacles, something must be done in the...