Xiang digu jing 相地骨經 a brief text on geomancy which allegedly follows the instruction of Master Green Bird (Qingniao Xiansheng 青鳥先生), who lived during the Han period 漢 (206 BCE-220 CE). He is also believed to have written a book called Zangjing 葬經, which gave advice to the auspicious position of tombs.
The Xiang digu jing is not listed in ancient book catalogues, but is included in the early Ming-period 明 (1368-1644) series Shuofu 說郛.