1. Re-bleaching: If the top color is too bright or uneven, try re-bleaching. Before re-bleaching, you can wet the top and gently wipe it with a towel to remove excess chemicals.

2. Reduce the concentration of bleach: If the concentration of bleach used is too high, you can try to reduce the concentration of bleach, thus reducing the brightness of the coat. The bleaching time can also be shortened appropriately to avoid excessive bleaching.

3. Repair with hair dye: If the coat color is too light, consider repairing with hair dye. You can choose a hair dye similar to the original hair color to achieve the reduction effect.