A LoPair au pair in China you are always regarded a part of the family and the host will include you in their family activities. As a “family member” you will learn to share responsibilities and contribute to make life in the family easier with less hassle.
Therefore on top of providing care to the host siblings, you are always welcome to provide a helping hand in the times where families need, although generally you are not responsible for housework that does not relate to the children’s or communal living areas.
An au pair's child care duties may include
take/pick up children to/from school
help with school homework esp. foreign language part
play with the children indoors/outdoors
take the children on outings to parks, playgroups and other activities
prepare light meals for children and clean up after the meals
make the children’s beds and get them to sleep
Do the children’s laundry and tidy up the children's toys
clean the children’s room or their play area