Wu Collection, Lower Volume Radical: Stone (shí) Gai Kangxi Stroke Count: 11 Page 830, Entry 01 Rhyme Collection (Yunji) and Collection of Rhymes (Yunhui) state it is pronounced ai (falling tone). Same as ai (obstruction). Jade Chapter (Yupian) states: to stop a stone. Also, the Collection of Rhymes (Yunhui) cites the Yellow Emperor Chapter of the Master Lie (Liezi): Clouds and fog do not obstruct their vision. Preface to the Biographies of Occultists in the Book of the Later Han (Hou Hanshu): Although the Great Way is described, the obstructions may be the same. The History of the Southern Dynasties (Nan Shi) cites Buddhist texts using this character; it is synonymous with ai (obstruction). It is also written in variant forms as hai and kai, with the same meaning.