怡颜悦色

Explanation: Still pleasant. 　　Source: Ming Wu Cheng-en, "Journey to the West" XVI back to Walker and Road 'Thou shalt Mo easy to read children promised, so I went, not to flatter you. To see the master, and to Yi Yan Yue color; raising a white horse to water plants and mix thoroughly; children worse off with every dollar, according to according to the kind of stick with you to see! '"