DangBaekJeon result, DangBaekJeon became bad money, and SangPyeongTongBo became good money. This is related to Gresham's law, which is a monetary principle stating that "bad money drives out good". The casting of DangBaekJeon was stopped in April 1867. The next year, its distribution was stopped because of an appeal from Choe Ik-hyeon(Hangul: 최익현, Hanja: 崔益鉉), a janglyeong(Hangul:장령, Hanja: 掌令) in Joseon Dynasty. He insisted that DangBaekJeon affected adversely to all classes of the society in the past two years. After its distribution had stopped, DangBaekJeon was exchanged with SangPyeongTongBo or China money(Hangul: 청전, Hanja: 掌令) and was used in iron. Dangbaekjeon
Good cop/bad cop Good cop/bad cop "Good cop/bad cop" routine, also called joint questioning or friend and foe, is a psychological tactic used in negotiation and interrogation. "Good cop/bad cop" tactics involve a team of two interrogators who take apparently opposing approaches to the subject. The interrogators may interview the subject alternately or may confront the subject at the same time. The "bad cop" takes an aggressive, negative stance towards the subject, making blatant accusations, derogatory comments, threats, and in general creating antipathy between the subject and himself. This sets the stage for the "good cop" to act sympathetically, appearing supportive and understanding,