Merging two characters into one, e.g., using 里 (li, "village"; "Chinese mile") for 裏 (li, "inside") as well as 里, and 余 (yu, "I, me") for 餘 (yu, "surplus") as well as 余.
五、相通字合併：如「里」和「裏」相通，以較簡的「里」為合併字。「余」和「餘」相通，合併字為「余」。