 Zhuzi yulei (Classified Dialogues of Master Zhu), juan 95, contains Zhu’s discussions with students on this Cheng Hao quotation. As mentioned, Zhu usually construes this as a li pattern underlying the complementary relationships among qi phenomena, which li itself transcends, hence implying a vertical bifurcation between li and qi. When a disciple asks Zhu whether the complements have to be “things” or whether, “Li too could have a complement?” The Master replies,