安于一隅

Explanation: Corner: a corner. Ease in a corner. Describe the situation and sustainable corner, does not seek improvement. 　　Usage: Partial official; as predicate; analogy perfunctory 　　Source: Song Chenliang "It holds the emperor on the second book": "His Majesty the Emperor Li Zhi Chen Christine but revenge, would not that be content with a corner, is also active in the Sajik." Thesaurus:  rest on one's laurels, Not seeking keep forging ahead, An important move it