How to use 10086 cornet to check trombone?

Take Huawei nova 3e mobile phone as an example, and the operation is as follows:

1, open the message and click the new information below, as shown below.

2. Edit cxjt and send it to 10086, as shown below.

3. Then, you will receive a short message inquiring about the business and reply to the short number inquiry, as shown below.

4. Then reply to CTQQWCY, as shown below.

5. Next, according to the received SMS, reply to CTQQWCY again.

6. In this way, you can find out the trombone corresponding to the trumpet.