Then depends on what ethnic is, a few ethnics have the culture to keep the dease at home for a year then burial but most of ethnics burial at once the body has been covered by the white fabric. So it is the time for taoist priest or lama to hold the funeral. The taoist priest or lama will carry the deceased on the their back and go to the water burial stage.
(this is a picture of the Tibet water burial stage)
After the deceased and Lama arrive at the water burial stage, lama will start chanting and fishes will come to wait to be feed by the dead body. it is quite drama, but in religion, they believe that those fishes are the representation of god and they only eat dead people and will never attack alive people.
Thus once the chanting is finished, the dead person whill be tired with a big stone and put inside the button of river. and then fishes will start eating the body as an ending process of the burial.