瞒天过海

Explanation: By fraudulent means in secret activities. 　　Usage: -Linked; as predicate, object, attribute; containing derogatory 　　Source: Ming Ruan Dacheng, "Swallow 笺 Share fortune": "I am charged to do the most famous, deceive no one asked, a majority of this year, and temporary." Thesaurus:  the strategy of stall of immediate attack by enemy, refuge, Mantianmeidi, expedience an expediential policy Antonym Group:  a thousand years great cause, question of fundamental importance for a hundred years, The long term providence