As soon as I go to the training post, I can make the following preparations for attending classes: understanding the training objectives and audiences, preparing teaching materials and courseware, and practicing explanations and demonstrations.

1. Know the training objectives and audience: Know the training objectives and audience before starting the lecture. This will help to determine which topics and knowledge points need to be explained and convey information in an appropriate way.

2. Prepare teaching materials and courseware: If lectures are needed, the boss or company has already prepared relevant teaching materials and courseware. Please make sure that you are familiar with these textbooks and courseware so that you can explain them smoothly.

3. Practice explanation and demonstration: Before the formal lecture begins, practice explanation and demonstration many times. This helps to improve self-confidence in speech and expression, and helps to find and solve potential problems.