2. Enter any two national flags. If you enter a national flag, it will consist of two letters (as shown below, the national flag of China is CN and the national flag of Hongkong is HK). Delete one of the letters, or you will be prompted that the name is too long. The same is true for repeated names such as changing words, but delete two letters or the prompt will be too long.
3. Renaming succeeded. If you are prompted to repeat, please try more permutations and combinations. Because the font of the mobile phone has been changed, these emoticons are all black spots. I changed the font back and cut the picture. I just tried a lot. General emoticons can't be registered, only the letters appearing on the national flag can be registered. Then you can have a cool blank name.