China Bank's foreign exchange reservation can be completed through mobile phone WeChat, and the specific steps are as follows:

1. Open the mobile phone WeChat, search for "Bank of China Micro-Banking", and click the attention.

2. After paying attention, enter the official account of "China Bank Weizhong Bank" WeChat, click on the micro-loan, select more functions from the pop-up options, and click Enter.

3. After entering, click Bind and Unbind under "My Debit Card" or "My Credit Card" to bind your existing debit card or credit card.

4. After binding, return to the homepage of WeChat official account, click Micro Life, select foreign currency reservation in the pop-up options, and click Enter.

5. Enter the foreign currency booking interface, select the type of foreign currency you need to book, such as USD, then select the booking outlets, and click Next.

6. In the pop-up interface, enter the cashier's information according to the prompt, and click Finish.

7. The confirmation information interface pops up. After checking the accuracy of all the information, click OK and the reservation is successful.