轻诺寡信

Explanation: Readily agreed to the requirements of people, some rarely honored. 　　Usage: Contraction type; as predicate, object, attribute; containing derogatory 　　Source: Qin Lier "I": "Cardiff Light Snow whoever Guaxin, choosing the more difficult and more easily, the sage still in trouble, it is not difficult to end." 　　Examples: Non-~ our home. (Qing Pu "Strange Impatiens") Thesaurus:  Qingyanguaxin