How does the echarts ring chart show the specific numbers on the ring?

clipboard.png
recently, making an echarts diagram requires such an effect on the picture. How can the numbers of the circular graph be displayed on it? I don"t think there is any

on the echarts instance.
Feb.22,2022

http://gallery.echartsjs.com/.
shows an example on the ring.


clipboard.png

itemStyle: {
                emphasis: {
                    shadowBlur: 1,
                    shadowOffsetX: 0,
                    shadowColor: '-sharpfff',
                },  
                normal: {
                    label: {
                        show: true,
                        formatter: '{b} {d}%',
                        position: 'inner'
                    },
                    labelLine: {
                        show: true,
                    }
                },

            }
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