Attributed to Hsiao-hsiao-shêng. Cf. The classic Chinese novel by Hsia Chih-tsing, 1968, p.165-202; Tu shih cha chi by Wu Han, 1956; and Chung-kuo wên hsueh yen chiu, by Chêng Chên-to, 1957. Also attributed to Wang Shih-chên. Cf. Hsiao-shuo k'ao chêng (Historical study of Chinese novels) by Chiang Jui-tsao, v.1, p.96