Sichuan Leshan Health School and Ya 'an Vocational and Technical College. According to official website of Sichuan Education Bureau, stomatology in Sichuan belongs to clinical medicine, and the length of study is three years. Its professional schools include Leshan Health School in Sichuan Province and Ya 'an Vocational and Technical College. Stomatology is a branch of medicine. As a chewing organ, the oral cavity bears the functions of human chewing, swallowing and partial digestion, and is also closely related to the basic functions required by human social activities, such as speech and expression.