Generally speaking, the length of feng shui curtain is mainly determined by the height of sight when people stand. Combining with the factors such as wavy lines and curves, taking the principle that people's eyes don't directly touch the point and considering the height change, the height of chin can be used as a reference. According to the standard of half a foot for traditional geomantic survey, the geomantic curtain in the bathroom should be 18 cm higher than the ground, which means it is beneficial to people and means that people are prosperous. What needs to be avoided is the distance from the ground 15 cm. This is an official ghost, and it is easy to commit a villain lawsuit and lose money.