Meaning: Lianlizhi refers to two trees growing together. The biwing bird is a legendary bird in which the male and female always fly together. It is used as a metaphor for a loving couple in classical poetry.
Source It is said that in the old China, King Kang of Song Dynasty took away the wife of his attendant Han Ping and imprisoned Han Ping. Han committed suicide. His wife rotted her clothes and threw herself off the stage while playing with King Kang. Everyone pulled his clothes, but he still fell down and died. He left a suicide note saying that he was buried with Han Ping, but King Kang buried them together. Buried in two places. Soon, a catalpa tree grew on each of the two tombs. It grew very large in ten days. The roots and branches of the two trees were intertwined. There was a pair of mandarin ducks on the trees, screaming sadly at each other.
Example: "Song of Everlasting Sorrow" by Bai Juyi of the Tang Dynasty
In the Palace of Eternal Life on July 7th, when no one was whispering in the middle of the night.
In the sky, I wish to be a winged bird, and on the earth, I wish to be a twig.
(Excerpt)