柳暗花明

Etymology
From the poem "You Shan Xi Cun"《游山西村》(Traveling to a Village West of the Mountains), written in the first lunar month of 1167 by the Southern Song Dynasty poet Lu You (陆游, 1125-1210):

Idiom

 * 1) an enchanting sight in springtime
 * 2) at one's darkest hour, a glimmer of hope