https://hubpages.com/religion-philosophy/taoism-feng-shui-technique-zhong-sheng-ji
Yin dwelling feng shui has been practised for thousands of years. Even well-educated men in ancient China believed in tomb feng shui.
The location of an ancestor’s grave is said to bring good fortune or otherwise to his or her later generations, depending on the feng shui of the grave. The theory is based on the fact that the deceased and the descendants shared the same bloodline. Therefore, if the body or bones lying in the tomb is absorbing the evil influences of bad feng shui, it will reflect on the later generations as well.
Creating a live grave is just an application of this theory to a living person. The personal belongings of the person concerned have his or her DNA. Therefore, burying these items, together with the personal data, is symbolical of the burial of that person.
Many Chinese believed that this technique of false burial can help in matters such as increasing life span, having a child or heir, promotion to higher official rank, scholarly achievements, attracting wealth and good fortune, and even saving lives, etc.
Jovan Tay ( 鄭黎明 ) 