Chinese family looking for helper

We are trying to hire a helper who can help us take care of a boy (3 years old) and deal with the housework. We both work in a university and the work hour is 9 am to 6 pm. The child goes to a full-day kindergarten from 8:30 am to 4:30 pm. Your duties mainly are helping us prepare his lunch which will be taken to the school and doing the housework.