The learning experience of the party school training class can be sent to the team leader through WeChat according to the following steps:

1. Open the WeChat application and confirm that the group leader has been added as a friend or contact.

2. Click the "+"button in the upper right corner of WeChat, select "Initiate Group Chat" or find the group owner on the chat page and click to enter the conversation.

3. Enter your learning experience in the message box. You can choose to enter text directly, send pictures, record voice or video as needed.

4. Click the Send button to send the learning experience to the team leader.

5. If you want to attach other files or materials to the sent message, you can click the "+"button and select "File" or "Album" to send related files.