  The China Dark Matter Experiment reports results on light WIMP dark matter
searches at the China Jinping Underground Laboratory with a germanium detector
array with a total mass of 20 g. The physics threshold achieved is 177 eVee
("ee" represents electron equivalent energy) at 50% signal efficiency. With
0.784 kg-days of data, exclusion region on spin-independent coupling with the
nucleon is derived, improving over our earlier bounds at WIMP mass less than
4.6 GeV.
