How to make an expression pack for Apple 6?

Apple 6' s specific method of making Yan characters is as follows:

1. As shown in the figure below, in the information input window, please click the arrow symbol first:

2. Then click the App Store icon, as shown in the figure below:

3. Then click on the four dot icons in the lower left corner, as shown in the figure below:

4. Then click the store icon, as shown:

5. Then you will see a new window named iMessage Apps, which contains downloadable facial characters. Just like downloading an app in the App Store, click Get-Install to download it.

6. After downloading Yan characters, you can use more Yan characters in iMessage information service, as shown in the figure.