A Study of Seedling Grading of Main Afforesting Tree Species in Ya an City;

Research on the Sustainable Development of Eco-tourism in Ya an City:Problems and Strategies;

Early Tertiary strata in the Ya an area, Sichuan;

A Survey of Freezing Injury of Bambusa pervariabilis × Dendrocala mopsis grandis in Yaan;

An Ethnologic and Historic Study on the MuYa Tibetan Groups;

Analysis on fatty acids in seeds of Ribes qingzangense;