What did the Feng Shui master mean when he told me to put a foot and two yellow cloth at the door?

Yellow cloth usually draws spells on it. If it is simply a piece of yellow cloth, the orthodox meaning of Feng Shui can only be that it belongs to gold or earth, depending on how yellow your cloth is, but from a certain angle, you can also see which faction the owner belongs to. Some Feng Shui masters are Taoists or Legalists, and their yellow cloth has been specially decorated to treat evil spirits and so on, so its scope and function are also very wide, whether it is Feng Shui, Taoism or faith.