1. Open China HowNet official website. Click the "Login" button in the upper right corner of the homepage to enter the login page.

2. Log on to China HowNet. Enter your account and password, and then click the "Login" button. If you don't have an account, you can click the "Register" button and follow the prompts to register a new account.

3. Enter the search page. After logging in, you will see the search page. On this page, you can enter keywords to search.

4. Search for papers related to "physical education teaching". Enter "sports" or other related keywords in the search box, such as "sports" and "physical exercise". Then, click the Search button.

5. Check the search results. A list of papers related to your keywords will be displayed. You can filter out the papers you are interested in according to the title, author, publication time and other information.

6. Download the paper. After finding the required paper, click the title of the paper to enter the detailed page of the paper. Here, you can view the full text of the paper. To download the paper, please click the "Download" button at the bottom of the page.

7. Pay for newspapers. Before downloading the paper, you will be prompted to buy the paper. According to your own needs, choose the right way to buy. Generally speaking, you can buy a single piece of paper or a bag (including multiple pieces of paper). After the purchase is completed, the paper will be automatically downloaded to your computer.

8. Read and save files. After downloading, you can open the paper file and read the full text. During reading, you can save your paper locally for future reference.

It should be noted that the retrieval and downloading function of China HowNet may be limited by factors such as authority and region. Therefore, in the actual operation process, you may need to adjust the retrieval strategy and purchase method according to the actual situation.

In addition, in order to improve the retrieval effect, it is suggested that when you input keywords, you use Boolean operations (such as AND, OR, NOT) to combine multiple keywords, so as to narrow the retrieval scope and find related papers more accurately.

In a word, searching and downloading papers about "physical education teaching" in China HowNet needs to go through the steps of logging in, searching, screening, downloading, purchasing and reading. In practice, you may need to adjust the retrieval strategy and purchase method according to the actual situation. Through continuous study and practice, you will be able to skillfully use China HowNet and provide strong support for your academic research.