It is best to set up a tombstone that is consistent inside and outside, that is, the coffin is sitting. If there is a problem with the original direction and it is necessary to change the direction, you can re-choose to look at the mountain and the township to set up a monument (extroversion) when setting up a monument. For example, the Wangshan Mountain in the Eighth Hospital has six orientations: dry mountain orientation, dry mountain orientation, seamount orientation, seamount orientation, ugly mountain orientation, ugly mountain orientation and so on. You can find a suitable sitting direction by combining use, context and so on.