Chinese family looking for helper for elderly/basic housewk

We are a family of 6 - An elderly mother, 3 girls aged 17 - 24 and a couple. We are quite independent and the main job is to help 90 year old elderly with her basic needs. She can walk a bit but her knees hurt a lot so helper would need to help soothe her pain with some massage etc. She also needs help with bathing, and bringing her to the toilet when needed. Helper can also cook for her (and whole family). And last but not least, help with the basic housework like mopping the floor and laundry.