Pronounced bo (third tone) and bai (fourth tone) in the "Guangyun" (Guangyun), and pronounced bo (third tone) and mo (fourth tone) in the "Jiyun" (Jiyun), "Yunhui" (Yunhui), and "Zhengyun" (Zhengyun), with the same pronunciation as "bai" (fourth tone). "Yupian" (Yupian) explains: 㼿㼣 refers to the brick structure of a well wall. "Boyya" (Boyya) explains: 㼣 means to build with bricks.