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Chinese Forest Biodiversity Monitoring NetworkXanthophyllum hainanense, Machilus chinensis in mid-layer. Species in low layer are rich and complex, which composition varies a lot.Aidia canthioides and Syzygium rehderianum are the Species which has most individual numbers and Aquilaria sinensis is the rare andendangered species in the plotResearch ProgressSpatial distributions of tree species was analyzed in Dinghu Mountain plot. Seed dispersal limitation, self-thinning and habitatheterogeneity primarily contributed to spatial patterns and species coexistence in the forest; Species–habitat associations wasinvestigated and habitat specialization plays an important role in maintaining the diversity of this species-rich subtropical forest; a longtermforest dynamics plot and a molecular phylogeny generated from three DNA barcode loci were implemented in Dinghu Mountainplot, they found that there is phylogenetic signal in plant-habitat associations and that patterns of co-occurrence within habitats aretypically non-random with respect to phylogeny; based on partial Mantel tests, both beta diversity and phylobetadiversity are dependenton plant groups and grain sizes; molecular markers to classify mature C.chinensis individuals into different genetic groups were usedand the results indicated that the different groups had different topographical associations.OutputsSince the establishment of Dinghu Mountain Plot in 2005, we are answering scientific questions about subtropical forest that wereimpossible to address just a few years ago. These include questions such as:relationships between spatial patterns and association of plant species populations,genetic diversity and its maintaining mechanisms,research on community phylogenetics and causes of species diversity.The research findings have been published on high profile international ecological journals , such as Oikos, PLoS ONE, and PlantEcology.Academic Exchange and TrainingWanhui Ye, Zhongliang Huang, Honglin Cao, Juyu Lian attended CTFS mapping plot--Beijing workshop in 2004, Wanhui Ye, ZhongliangHuang attended Cross-strait “Academic Exchange of Ecosystem diversity” in Taichung. Zhigao Wang, Lin Li, Juyu Lian and Guojun Lin.went to University of Alberta as visiting scholars.19