Ecological Benefit of Plantation of Alltingia gracilipes and Schima superba Under Canopy of Sprout Land of Cuminghamia lanceloata Litter production and nutrient return in two natural forsts and a Cunninghamia lanceolata plantation in Wanmulin Nature Reserve THE Altingia gracilipes FOREST IN CHINA Discovery of Paratingia and Paratingiostachya from the Shanxi Formation of the Early Early Permian in the Wuda Area of Inner Mongolia, China The Water Holding Capacity and Soil Fertility in the Mixed Forest of Cunninghamia lanceolata and Altingia gracilides Studies on the Epidermal Structure of Tingia carbonica Study on the Technical of Cutting Propagation of Tender Branch for Broad-leaf Tree Species