Excuse me, what dynasty are these copper coins? Find a solution

These copper coins belong to the Qing Dynasty. They have unique designs, such as circles and squares, engraved with obvious dragon patterns. In addition, they also have different sizes and weights. Generally speaking, these copper coins all use "Kuping" or "Liang Wen" to express their weight and value. In the Qing dynasty, these copper coins were one of the main currencies in circulation and were widely used by people.