The creation of large-area forest growing stock volume (GSV) maps of Northeast and Southeast China, based on ERS-1/2 tandem coherence data from the mid 1990s, was aim of the Forest DRAGON 1 project. The evaluation of the map products reveals a reasonable agreement above 70% in terms of forest/ non-forest when compared against freely available Earth Observation products for both NE and SE China. The assessment of forest cover and structure changes in China from the mid 1990s into the current decade is addressed by a pilot study at the regions of Daxinganling and Xiaoxinganling. A one-year stack (2007) of Envisat ASAR GMM data has been processed at 1-km pixel size with the BIOMASAR algorithm to obtain continuous GSV . Accordingly, the ERS-1/2 tandem data has been reprocessed to 1 km to allow an intercomparison of the two products, which in turn allowed observing scaling effects on the forest GSV.