Zi Collection, Upper Volume, Page 45, Entry 04 Pronounced li hua (entering tone) - a pottery vessel. Also, "Zhengzitong" states: Some believe the character "luán" is similar to "luán," signifying completeness, roundness, and connection. The round tiles used for stove chimneys today, resembling un-split bamboo tubes, are examples of this. Therefore, they are commonly called "wǎ" (tile).