  In the Circular Electron Positron Collider (CEPC), a measurement of the Higgs
CP mixing through $e^{+} e^{-} \rightarrow Z H \rightarrow l^{+} l^{-}(e^{+}
e^{-} /\mu^{+} \mu^{-}) H(\rightarrow b \bar{b} / c \bar{c} / g g)$ process is
presented, with $5.6\ \mbox{ab}^{-1}$ $e^{+} e^{-}$ collision data at the
center-of-mass energy of $240\ \mathrm{GeV}$. In this study, the CP-violating
parameter $\tilde{c}_{Z \gamma}$ is constrained between the region of $ -0.30$
and $0.27$ and $\tilde{c}_{Z Z}$ between $-0.06$ and $0.06$ at $68\%$
confidence level. This study demonstrates the great potential of probing Higgs
$CP$ properties at the CEPC.
