use the default values 
        
        only show the animation 
        
        only show the text 
        
        fontSzie: 25px, arcRadius: 12, lineWidth: 8
        
        fontSzie: 25, arcRadius: 12, lineWidth: 8
        
        fontSzie: 25, fontWeight: 'bolder', fontFamily: 'Microsoft YaHei', fontStyle: 'italic'
        
        the spinner and text of loading show above the chart