  Weakly Interacting Massive Particles (WIMPs) are the candidates of dark
matter in our universe. Up to now any direct interaction of WIMP with nuclei
has not been observed yet. The exclusion limits of the spin-independent cross
section of WIMP-nucleon which have been experimentally obtained is about
10^{-7}pb at high mass region and only 10^{-5}pb} at low mass region. China
Jin-Ping underground laboratory CJPL is the deepest underground lab in the
world and provides a very promising environment for direct observation of dark
matter. The China Dark Matter Experiment (CDEX) experiment is going to directly
detect the WIMP flux with high sensitivity in the low mass region. Both CJPL
and CDEX have achieved a remarkable progress in recent two years. The CDEX
employs a point-contact germanium semi-conductor detector PCGe whose detection
threshold is less than 300 eV. We report the measurement results of Muon flux,
monitoring of radioactivity and Radon concentration carried out in CJPL, as
well describe the structure and performance of the 1 kg PCGe detector CDEX-1
and 10kg detector array CDEX-10 including the detectors, electronics, shielding
and cooling systems. Finally we discuss the physics goals of the CDEX-1,
CDEX-10 and the future CDEX-1T detectors.
