Visa docs for baby (bangladesh nationality ) born in chinese mother & bangladesh father in japan

Dear sir,
I need the information for visa to enter china for our baby 4 month old
.
i'm bangladesh national with permanent resident , wife is chinese national in japan with wife of permanent visa status.
please inform us what documents necessary for visa for our child, is bangladesh national　with permanent resident stutus in japan ? or any other options to get multiple entry visas ? thank you