  We report results of a search for light Dark Matter WIMPs with CDEX-1
experiment at the China Jinping Underground Laboratory, based on 53.9 kg-days
of data from a p-type point-contact germanium detector enclosed by a NaI(Tl)
crystal scintillator as anti-Compton detector. The event rate and spectrum
above the analysis threshold of 475 eVee are consistent with the understood
background model. Part of the allowed regions for WIMP-nucleus coherent elastic
scattering at WIMP mass of 6-20 GeV are probed and excluded. Independent of
interaction channels, this result contradicts the interpretation that the
anomalous excesses of the CoGeNT experiment are induced by Dark Matter, since
identical detector techniques are used in both experiments.
