Abstract: Electron Ion Collider in China (EicC), a new plan proposed by Institute of Modern Physics, Chinese Academy of Science to upgrade the HIAF facility, is mainly designed for studying sea quark, gluon and valence quark. The Center Mass Energy of the EicC is near 20 GeV. In order to maintain polarizability of proton bunched beams, the pRing (proton Ring) is designed to have the octave shape layout, while the racetrack layout is adopted by the eRing (electron Ring) to make full use of the tunnel space. For pRing, the proton center energy is 20 GeV, the horizontal and vertical rms emittance is 300 and 180 nm·rad respectively, and the β function at collider point is 0.08 and 0.04 m in the horizontal and vertical plane. For eRing, the electron beam center energy is 3.5 GeV, the rms emittance in transversal plane is 60 nm·rad, and the β function at collider point is optimized to be 0.4 and 0.12 m in horizontal and vertical direction respectively. As a result, the designed luminosity can achieve 2×10³³ cm^–2s^–1. Furthermore, the influence of chromaticity compensation scheme on the Dynamic Aperture (DA), including the compensation patterns, the beta function and the phase advance in the collision points, is also studied. Accordingly, chromaticity compensation scheme is finalized as compensating by arc and short straight sextupoles, the DA of the pRing (>8σ) and the eRing (>20σ) can meet the design requirement of the beam size larger than 6σ.