The steps to set the deduction sequence for WeChat relative cards are as follows:

1. Open WeChat and click "Pay" at the top of the "Me" page.

2. Click "Wallet" to enter.

3. Select "Relative Card" to enter and manage your gifted relative card.

4. In the relative card, click on the relative card for which the deduction sequence needs to be set.

5. Click "Priority Deduction Method" to modify the order of priority payment.

6. Select the priority deduction method you want to use. If the priority deduction method fails, the next deduction method will be automatically used.