Li He wrote "If Heaven Has Love, Heaven Will Grow Old", and no one in the Tang Dynasty could match it, but only in the Song Dynasty could he match the next line

The poet Li He of the Tang Dynasty, what kind of sadness did he have or what kind of worldly troubles did he experience to write the poem "If Heaven Has Love, Heaven Will Grow Old". At first glance, this poem seems to be very affectionate, but after reading it, you will find that the poem actually describes that if the heavens can have feelings, they will definitely grow old with the passage of time.