Ask for advice, the first contact with the echarts.js x axis axis down a little distance how to achieve?

clipboard.png
as shown in the figure, how can I move this line down a little further?
this is the code for the x-axis in the configuration item to solve. 

                xAxis:  {
                    type: "category",
                    boundaryGap: false,
                    data: ["","","","","","",""],
                    axisLine:{
                        show:true//
                    },
                    axisTick:{
                        show:false,  //
                    },
                    offset:20,

                },
Javascript
May.22,2021

modify grid configuration item 

xAxis:{
  // ...
}
grid:{
  bottom:0 // 
}

in the xAxis configuration, offset is the offset of the x-axis scale text and cannot control the offset of the axis.

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