The specific steps are as follows: 1. Look for official website, a talented star, and look for the word download on the homepage of official website. After clicking download, there will be a box for you to choose the type and model of the product you bought. You can choose according to the model of your own product.

2. Then, there will be some information about your model. You filter the information you want. After screening, the information of the textbook you want will appear below, and then click on it.

3. After clicking, the download information of the selected course book will appear. At this time, you can click Download directly.