How many meters should the distance between the door and the gatehouse of Feng Shui house be?

There are four gates (gates) and gatehouses (gates) of geomantic omen. As the old saying goes, there are four gates with a weight of one thousand pounds. Explain the importance of the gatehouse. Methods: 1. Use the compass to set the direction in the center of the gate, where to stand (as the gatehouse), and make a valve line with the position line of the gatehouse. 2. Under the eaves (fixed point on the house direction line), then connect the points under the eaves with the gatehouse, measure 157.5cm (one step) with a centimeter ruler, and measure the midpoint of the doorsill (the position of the gatehouse). I hope I can help you.