Yue Yue, nurses and nannies are all domestic servants, but their work contents and clients are different. Yue Yue is mainly responsible for taking care of parturient and newborn, including postpartum recovery, diet conditioning and baby care. Nurses are mainly responsible for taking care of babies aged 0-3, including feeding, bathing, changing diapers and early education. Nanny is mainly responsible for daily cleaning, cooking, shopping and other household chores.