How much is a dragon ruler?

Everyone can make a dragon ruler regardless of the amount of money. If you want to be a Feng Shui master, make it with many materials on the ground, such as bamboo and steel. So, there are signals everywhere. If you want to measure minerals and treasures, you must make them with similar things, so there will be less interference. If you want to test things, just read novels and read divination. Free novels can be searched online. The author wrote it according to his own invention, and there are specific methods. A plastic tube and a radio antenna can achieve thousands of the same effects, mainly in the method.