Sea not necessary to use 1 CBM which is 1 m3. Generally for up to customer door service, most shipper charged a minimum of .3 m3 which varies from 650-900rmb per m3.

They will give you a special code, just make sure you key in the correct warehouse address with this special code into your taobao address. When you buy just select delivery to this warehouse address. Also, put a remark for them to write your special code on the packages.

then why ask dumb question if you know the procedure?