Explanation: ① means traveling back and forth. Also Yu Renshi mundane. ② refer Juji. King said that when the other party also used. Source: Song Ouyang Xiu, "Day Kam Tong Kee phase state": "running hacked Khan, ashamed and fell down to the dust from the repentance of the vehicle between the horse enough." Examples: Once the do not go, never to look ~ evil? ★ Mai Song "Yung Chai Qin Hui Li Linfu Continuance"