Some people claim that yin zhai feng shui is most powerful. If your parents are buried in a grave with superb feng shui, you will be very wealthy the next year. The term used is 寅葬卯發 meaning "if a deceased parent is buried in the Yin year, the children will get rich in the Mao year". Such claims can never be proved or disproved.
Both my parents who died 10 and 20 years ago were cremated and the ashes scattered into the sea. Of course I did not get rich right away but it is enough to say that if the way to bury the dead is related to the well being of the descendants, then cremation is highly recommendable using myself as a living example.
Perhaps I will be the first Feng Shui master to be cremated after I die.