Household items? (Beijing)

Hiya,
We are moving to Beijing next month and was wondering where is the best and biggest place to go to do household shoping( mops,brums,buckets etc.)..
We have furniture coming with us but will need all those little things that is used daily in households:-))
Also,where would you recommend to do that first grocery shopping as we will need everything and would like to go to big place with lots of choices..
Ps.we will be leaving at Chao Young Park...
Thank you very much for any commends and suggestions...
Cheers,