BJ-JN (also called Yuzhu Xiaogu), is a traditional Chinese medicine that prevents hepatic injury; consists of six crude drugs: Curcuma wenyujin Y.H. Chen & C. Ling (Zingiberaceae), Polyporus umbellatus (Pers.) Fries (Polyporaceae), Paeonia lactiflora Pall (Paeoniaceae), Areca catechu L (Arecaceae), Trionyx sinensis Wiegmann (Trionychidae) and Gallus gallus domesticus Brisson (Phasianidae)