Send white or yellow flowers. Gifts of flowers are common at Chinese funerals in the same way that people give food or flowers in a Western funeral. Make sure the florist understands not to use any red flowers, a red vase or any red decorations in the arrangement.
Open the white envelope that the family may have distributed. Some families give a small piece of candy in a white envelope to each person at the funeral. This is to remind people that life has its sweetness among the bitterness. When you remove the candy, immediately discard the white envelope, which represents sadness.