Regarding the tax deduction of mobile phones, because the amount of mobile phone price ×20% is the tax to be deducted. For example, the credit card handling fee of 5000×20% is the tax of 1 000 yuan, and the tax of 1 000 yuan needs to be paid. This CITIC Bank will directly deduct it from your credit card. Whether this activity is cost-effective or not needs to be measured by ourselves.