Limits on light WIMPs from the first 102.8 kg-days data of the CDEX-10 experiment

We report the first results of light Weakly Interacting Massive Particles( WIMPs) search from the CDEX-10 experiment with a 10 kg germanium detector array immersed in liquid nitrogen at the China Jinping Underground Laboratorywith an exposure of 102.8 kg-days. At an analysis threshold of 160 eVee, improved limits of 8 $\times 10^{-42}$ cm$^{2}$ and 3 $\times 10^{-36}$ cm$^{2}$ at 90% confidence level on spin-independent and spin-dependent WIMP-nucleon cross-sections, respectively, at a WIMPmass (m$_{\chi}$) of 5 GeV/$c^2$ are achieved. The lower reach of m$_{\chi}$ is extended to 2 GeV/$c^2$.