捉贼捉赃

Explanation: Handling non-matter metaphor should be based on facts. 　　Source: Song Hu was in the beginning, "Introduction to Governance Day curtain hell," saying, saying 'dirty thieves to catch, catching catching double. 'This, although Li Yan, a very proper way. " 　　Examples: ~, Unto see double. And undocumented see, how was he off the crime. ★ Ming Feng Meng, "Ancient and Modern Fiction" Volume-fifth