來日方長（來日方長）　

◎ 來日方長 láirì-fāngcháng

[There are many days yet to do that;there will be ample time ahead; there‘ll be a time for it] 將來的日子還很長。表示事情還大有可為

曼思故國,來日方長,載悲黑奴前車如是,彌益感喟。——《魯迅書信集·致蔣抑卮》