Longyin is a kind of silver coin in the late Qing Dynasty. Because silver coins are engraved with the word "dragon", they are rarely used alone to make money. Mostly dedicated to the landlord. Put a dragon silver on the left side of the landlord [immediately on the side of the dragon god] to make money. The dragon silver seal has a dragon pattern and has a high currency. Through the hands of millionaires, it is widely accepted, so Longyin is the first choice to show "borrowing the law". It can eliminate disasters and solve problems, exorcise evil spirits, ward off evil spirits in towns and houses, and promote wealth and promotion. Dragon silver generally works best with even numbers.