The signature of the circle of friends will be displayed on the business card. After setting the personalized signature of the circle of friends, the cover will be displayed automatically. The signature of friends circle is an expression of personal character, personal culture and personal information, so that more people can know their contacts. You can write some poems, you can also write some paragraphs that show your personality, you can also express some feelings, emotions and words, and you can also set the expression mode through software and text symbols.