['no point', 'one point', 'two points'],
                    selectedMode: 'single'
                },
                tooltip: {
                    trigger: 'axis'
                },
                singleAxis: {
                    type: 'category',
                    min: function (value) {
                        return value.min - 20;
                    },
                    max: function (value) {
                        return value.max + 20;
                    },
                    data: ['类