The name H. Syekh Oesman Sahabuddin is popular for the people of Rokan Hilir Regency, as the syekh is the role model for the people. Although he is gone, his name still remembered for the community of Rokan Hilir, especially in Bagansiapiapi. In his dedication for Bagansiapiapi he had the students who already had the Khalipah title or ch in Bagansiapiapi, he taught fikih, hadist, tasawuf and…