- 物以类聚 wùyǐlèijù birds of a feather flock togetherThings of the same kind naturally group together; nowadays often used in a negative sense to describe bad people associating or conspiring with each other
- 事文类聚 shìwénlèijù Shiwen LeijuAn encyclopedia compiled by Zhu Mu during the Southern Song dynasty; modeled after works like [[艺文类聚|藝文類聚|yi4 wen2 lei4 ju4]], it was later expanded into the larger compilation [[古今事文类聚|古今事文類聚|gu3 jin1 shi4 wen2 lei4 ju4]]
- 古今事文类聚 gǔjīnshìwénlèijù Gujin Shiwen LeijuComprehensive collection of facts and literature from ancient and modern times, an expanded Song Dynasty encyclopedia compiled by Zhu Mu
- 物以类聚，人以群分 wùyǐlèijùrényǐqúnfēn birds of a feather flock togetherThings of a kind come together, and people of a kind group together; implies that like-minded people will naturally associate with one another.
- 艺文类聚 yìwénlèijù Yiwen LeijuAn early Tang dynasty encyclopedia in 100 volumes compiled by Ouyang Xun and others, notable for its structure of placing factual information before related literary works; it is one of the Four Great Leishu of the Tang dynasty.
