| Parameter Setting --- Invitation Setting Invitation Interface Setting 
 Operator can decide the style of invitation interface. 
 The way to edit invitation style: Option -- Parameter Setting -- Invitation -- Invitation interface. 
 
 The part in blue box decides the color combination of invitation box; The part in yellow box decides the image appears at the left part of invitation box. 
 
 I just uploaded a bigger image(in red box). From the image below we can find that the invitation box will fit the bigger image automatically. 
 
 
 
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