Chinese American family seeks help

We are Chinese Americans, currently living in Hong Kong. We are a full-time working couple with two children: a 9-year-old daughter and a 7-year-old son. We will live in a 2-bedroom, 2-bathroom apartment in Causeway Bay. Our children take the school bus nearby every day, so there is no need to make lunch, and the children are in school from 7am to 4pm. We need someone to take the children to extracurricular activities and help with simple homework. Duties also include washing, folding and ironing our work clothes. There will be security cameras in the apartment. You will now share a bedroom with my two children (7 and 9 years old). The children sleep in bunk beds. You sleep alone in a loft bed. We may hire another helper, so you may need to live and work with them, but maybe that is a year from now. If one helper is enough, we will not hire another. Our family speaks English and Mandarin as their native language. We live within a 2-minute walk from Causeway Bay MTR station. There is a Wellcome supermarket downstairs. Two bedrooms and two bathrooms 500 square feet. Under no circumstances will we lend money to the helper. As the management of the company, we expect the servants to listen carefully to our requests.