Research on the folk customs and literature of Guangxi in the 20th century Research on the frontier issues of literary theory in the 21st century Research on the communication mode of Chinese opera in the 20th century Research on Chinese piano education thought in the 20th century research on the core values of the police literature in the 21st century research on Germans coming to China in the 19th century Study on the Chinese literature in the 20th century Research on Chinese Water Margin drama in the 20th century Research on the keywords of Chinese literary theory in 20th century Researching on the Western Impersonal trend in the 20th century