Research on group of literati and poetic school in Yuan dynasty 并列题名：Research on group of literati and poetic school in Yuan dynasty Research on polarization of literati stratum and poetics between the Song and the Yuan dynasty Research on county administration and local society in dynasty 并列题名：Research on polarization of literati stratum and poetics between the Song and the Yuan dynasty Geographical distribution of literati and the literary scene inthe Yuan Dynasty Research on the envoy literature of Song dynasty