Li Tang, planted by Emperor Xuanzong of the Tang Dynasty, was neglected all over the mountain.

Tang Xuanzong was proficient in melody and trained a band in Beijing's "Liyuan" (named after a large number of pear trees). Xuanzong was lucky enough to be in Huaqing Palace, and the band lived in spiritual practice. He wanted to plant pear trees here, but the pear trees had to be grafted by Li Tang (commonly known as Li Du). After the pear was planted, it was not grafted, and the Anshi rebellion began; These female parents who are ready to graft have grown up and left them alone. The word "wild" in Tang Ye contains many feelings of the poet! The word "open" and "do" tells how many "flowers fall on the treetops"! The word "gone with the wind" in "Xiangyu" contains the poet's regret! It turned out to be the tree of the imperial city, and now it is a forest without a master; The land that used to be in charge is now a no-man's land; Disciple San, Yu Xiang (Li Tang petals) shocked the wind; Wild, tired and gone with the wind, how many lamentable artistic conceptions have been written! What a terrible disaster the monarch's dissolute enjoyment has brought to the victims of the country!