Yáng Chéngbó 楊成博 is the named “originator” (先師) of the underground Qīng-period martial-arts injury-medicine manual KR3ee051 Yáng Chéngbó xiānshēng yíliú xuédào mìshū 楊成博先生遺留穴道秘書. He is otherwise unknown to the standard bibliographies (Zhōngguó zhōngyī gǔjí zǒngmù, CBDB, Wikipedia); no biographical sources survive, and his lifedates cannot be established. The honorific xiānshēng yíliú 先生遺留 (“bequeathed by Master …”) and the shī yuē 師曰 (“the master says …”) frame of the text are consistent with a teaching-lineage origin in which “Yáng Chéngbó” may have been an early wǔshù-medicine ancestor cited by an anonymous later transcriber.