Long-term regret that spring is nowhere to be found means: I often regret that the lost spring is nowhere to be found, but I don't know that it has moved here.

This poem is from Peach Blossom in Dalin Temple written by Bai Juyi in Tang Dynasty. The whole poem vividly, concretely, naively and vividly depicts the scenery of spring, showing the poet's infinite love for spring and his childlike innocence. Bai Juyi is a great realistic poet and one of the three great poets in the Tang Dynasty. Bai Juyi and Yuan Zhen * * * advocated the new Yuefu movement, and together with Liu Yuxi, they called the world "Bai Yuan" and "Bai Liu".