What is the star on the title of peace elite?

In the game "Peace Elite", the ace star has three colors. When the super trump card is 1-5 stars, it defaults to copper, when the super trump card is 6- 10 stars, it will change color to silver, and when it reaches 1 1 stars, it will change color to gold.

Title refers to giving people a certain title to show their status. Refers to the name of something. Winning the title of peace elite can win the title of war zone through the leaderboard. The professional title system of the peace elite is divided into five categories, namely, primary professional title, intermediate professional title, senior professional title, most powerful national service and systematic professional title.