The specific operation steps are as follows:

1. First, open the [Km] software in the mobile phone, as shown in the figure below, and then proceed to the next step.

2. After entering the song selection interface, click [My] in the lower right corner, as shown in the figure below, and then go to the next step.

3. Then, in my interface, click [Login/Register] to perform the login operation, as shown in the figure below, and then go to the next step.

4. Then, after logging in, return to the song selection interface, click the [Pass Song] button, as shown in the figure below, and then go to the next step.

5. Then, enter the song transmission interface, select [Search for local songs], wait for the search results, as shown in the figure below, and then go to the next step.

6. Finally, after the search is completed, select the song to upload, and then click [OK] below to complete the operation, as shown in the figure below. In this way, the problem is solved.