Liju, a dual sentence, is also called Lici and Liyu. "Shi Tong·Miscellaneous Comments" - Antiphons and lici are popular among the people.
Why do haiku have the meaning of dual sentences? Because Li, whether used as a noun, verb or adjective, has the meaning of being in pairs or pairs.
Husband and wife (husband and wife); Li Zhi (a blessing to another couple); Li Ying (the figure of the couple, a photo of the couple).
Pianli (the dual syntax of the article); Liqiao (the duality is exquisite); Liju (the duality sentence); Li style (the duality style).
Lipi (pairs of deerskin. It was an ancient wedding gift); Lishi (a right thing).