犬牙交错

Explanation: Wrong: cross, mixed. Border line is very tortuous analogy, like a dog as uneven teeth. Analogy is also complicated, both sides have a number of factors varied cross. 　　Usage: The main predicate; as the predicate attribute; describe the territorial 　　Source: Han Ban Gu, "Han Jin of Zhongshan Biography": "Princes since the procreatrix, the late emperor so wide seal Citylink, canines with the wrong person, were also for the rock." 　　Examples: Boundary line of the two countries ~. 　　Riddle: Dog Bite Dog Thesaurus:  crisscross, Qianduanwanxu, 3 2 thread