月晕知风，础润知雨

Explanation: Halo appears to be the wind; foundation stone wet, going to rain. Analogy can be inferred from some signs of what will happen. 　　Source: Long opinion, "People change things on the Laiyang" halo know the wind, knowledge base run rain, the sky Laiyang heel who fear burglary, did not come trouble finding have been reported in disguise. " Thesaurus:  Aureole The wind Run the shower base, Aureole Know the wind Churunzhiyu