The steps to download the Yayin Dating app are as follows:

1. According to the mobile phone brand and operating system used, open the corresponding application store, such as Apple AppStore or Android App Market.

2. Enter Yayin Dating in the search box of the app store and click the search button.

3. Find the Yayin dating application in the search results and click to enter the application details page. On the page, you can view information such as the app's description, ratings, and reviews. If you are sure you want to download the app, click the Download or Install button.

4. The downloading process takes time, depending on the network connection speed and the size of the application. Wait patiently until the app is successfully downloaded and installed on your phone.

5. After the installation is complete, find and click the Yayin Dating icon on the home screen of your phone or in the application list to open the application.

You can now start using Yayin Dating App, register an account and enjoy the dating function.