Judo is divided into ten stages and five levels, and the stages are distinguished by belt color. The tape from the beginning to the fifth paragraph is black, the sixth to the eighth paragraph is red and white, and the ninth to the tenth paragraph is red. The first-class colors are brown, blue, orange, green and yellow. Judo has different grades according to the level of athletes. Usually the level of judo is determined by the color of the belt. The novice who has not entered the stage is a leucorrhea, the first to fifth stages are black belts, the sixth to eighth stages are red and white intervals, and the ninth to tenth stages are red belts. At present, only a few people in the world have reached the status of red belt, but in order to distinguish easily in large-scale sports meetings, it is often stipulated that one party wears a white belt and the other party wears a red belt. Judo is divided into ten stages and five levels, the five levels are the lowest, and the ten stages represent the highest realm that no one can match. Judo referee will be a presiding judge and two vice judges. If the judgment of the presiding judge is different from that of the two deputy judges, the minority is subordinate to the majority. The competition time shall not be less than 3 minutes and shall not exceed 20 minutes. At that time, the bell at the scene will ring. At this time, if there are no special circumstances, the presiding judge will announce that "time is up" and discuss with the two deputy presiding judges to decide the outcome according to the records. When the result is announced, the referee will ask both sides to return to the original position where the game started, and then point a finger at one of them to show victory?