BiMo was a rank in ancient Nosu society and the Bimo was in charge of the documents and offer- ing sacrifice to Gods and ancestors.He must know scriptures and classics in the Nosu language,which had a rigorous hereditary system.His main duties and activities are calling souls,arranging the bier,seeing the bier of the dead,averting suffering,driving ghost,auguring,selecting lucky days and taking brilliant adjudicating on an dispute.The BiMo is important in the struggle between life and death.