ck', function (event) {
                if (event.data) {
                    const subData = drilldownData.find(data => {
                        return data.dataGroupId === event.data.groupId;
                    });
                    if (!subData) {
                        return;
                    }
                    chart.setOption({
                        xAxis: {
                            data: subData.data.map(item => item[0])
                        },
                        yAxis: {},
  