晨昏定省[chén hūn dìnɡ shěnɡ]
词典p
1. see parents to bed and greet them in morning：1055. 完璧歸趙 to return the thing to the owner intact | 1056. 晨昏定省 see parents to bed and greet them in morning | 1057. 五官端正 well-formed features