Childcare Needed - Full-time / Part-time

I have someone who needs afternoon and evening nanny care for their 3 1/2-year-old in the Richmond District of San Francisco. Is anyone able to suggest or refer anyone to watch him for one and a half hours? This would include pick up from their daycare to the caretakers home. The parent would then go pick them up after work. The hours would be from 4:30 to 6 p.m. Preferably Chinese speaking as the child has limited English.