China appears to be expanding its nuclear capabilities, US researchers say in new report China is building a second field of missile silos in its western deserts, according to a new study, which researchers say signals a potential expansion of its nuclear arsenal and calls into question Beijing's commitment to its "minimum deterrence" strategy. Identified via satellite imagery, the new missile base in China's Xinjiang region may eventually include 110 silos, said the report released on Monday by the Federation of American Scientists (FAS). It is the second apparent silo field uncovered this month by researchers, adding to 120 silos that appear to be under construction in the neighbouring province of Gansu, as detailed by the James Martin Centre for Nonproliferation Studies.