In geomantic omen, "two dragons play with pearls and you must see a pool", but without a pool, it is not. It means that two rivers come from opposite sides and converge into a pool at the same time, which means that two dragons are playing with pearls.
The image of two dragons playing with beads is that dragons are playing with beads. The two brothers' house is a row of roofs. If they are parallel, there will be unnecessary disputes. One high and one low symbolizes peace.