option = { backgroundColor: "white", xAxis: { type: 'category', boundaryGap: true }, yAxis: { type: 'value', boundaryGap: [0, '30%'] }, grid: { left: '3%', right: '4%', bottom: '3%', containLabel: true }, visualMap: [ { type: 'piecewise', show: false, dimension: 0, seriesIndex: 0, pieces: [{ gt: 2, lt: 6, color: 'white' }]}, { type: 'piecewise', show: false, dimension: 0, seriesIndex: 1, pieces: [{ gt: 2, lt: 6, color: 'red' }]}, ] , series: [ { type: 'line', smooth: 0.6, symbol: 'none', lineStyle: { color: 'green', width: 2 }, zlevel:1, areaStyle: {color:'white',opacity:1}, data: [ ['2019-10-10', 200], ['2019-10-11', 400], ['2019-10-12', 650], ['2019-10-13', 500], ['2019-10-14', 250], ['2019-10-15', 300], ['2019-10-16', 450], ['2019-10-17', 300], ['2019-10-18', 100] ] }, { type: 'line', smooth: 0.6, symbol: 'none', lineStyle: { color: 'green', width: 2 }, areaStyle: {}, data: [ ['2019-10-10', 180], ['2019-10-11', 300], ['2019-10-12', 600], ['2019-10-13', 560], ['2019-10-14', 270], ['2019-10-15', 360], ['2019-10-16', 400], ['2019-10-17', 260], ['2019-10-18', 90] ] }, { type: 'line', smooth: 0.6, symbol: 'none', lineStyle: { color: 'green', width: 2 }, zlevel:2, data: [ ['2019-10-10', 180], ['2019-10-11', 300], ['2019-10-12', 600], ['2019-10-13', 560], ['2019-10-14', 270], ['2019-10-15', 360], ['2019-10-16', 400], ['2019-10-17', 260], ['2019-10-18', 90] ] } ] };