Clinical expertise: filling operation, root canal treatment, cleaning operation.

Associate professor Chi graduated from Hebei Medical University in 1995 and worked in the department of stomatology of the Second Hospital of Hebei Medical University. He has presided over one provincial-level project, two provincial-level projects, participated in one project of natural science foundation of Hebei province, three projects of tackling key scientific and technological problems of Hebei province, won one third prize of scientific and technological progress of Hebei province, and one second prize of health department of Hebei province. Associate professor chi is currently studying the basic and clinical aspects of root canal therapy. He published 29 papers, among which 14 were the first author. The paper "Clinical use of profile nickel – Titanium instrument with crown – down technique after root canal preparation" was reprinted by Dentsply and promoted worldwide. He edited 1 volume of popular science books and participated in the compilation of 3 professional treatises.