Family of 3 looking for domestic helper

We are a simple Chinese family of 3, (working parents and a 11 years old boy) looking for domestic helper. Major duties are general house work, cooking and marketing(no pets, no elderly) and provide your own room. Flat size is about 650 sqft. Weekly holiday is on Sunday. We hope to recruit a cheerful, responsible and polite helper, and willing to communicate. We want our helper to be non smoker, no drug, no debt nor money borrowing. Thank you.