After the incense is analysed, Guo Xiu, Lu Ju, and the imperial physician Song are all present. Guo xiu must have felt uneasy after he obtained the incense from the hill, and he must have asked for a professional incense specialist to check the quality of the incense. The incense specialist must be a member of the royal family, but still must be professional enough to be able to detect the presence of hallucinogenous herbs. The royal family has misjudged the involvement of lu jiu in the incense matter.