Embroider directly. There must be something on the pattern, just follow the embroidery; If there is no copper coin on the pattern, draw your own copper coin pattern and embroider it on the cash cow that should have copper coins. The advantage of direct embroidery is that it is convenient and not easy to change, but the disadvantage is that it is not very vivid.

Stitch an object or model. If the pattern size is appropriate, you can sew physical copper coins or copper coin models on it. The advantage of this is that it is bright and dexterous, but the disadvantage is that copper coins can only be sewn in one hole, which is not very secure and afraid of falling off.

Paste an object or model. Stick the copper coin or copper coin model directly on the pattern with adhesive. The advantage of this is that it is strong and not easy to fall off. If you want to change the distribution of copper coins, you can leave no trace. The disadvantage is that it will feel dull when posted.