e: 'category',
                    data: ['优', '良', '轻度污染', '中度污染', '重度污染', '严重污染']
                }],
                parallel: {
                },
                series: [{
                    name: 'no point',
                    type: 'parallel',
                    data: []
                }, {
                    name: 'one point',
                    type: 'parallel',
                    data: [[43, '良']]
                }, {
                    name: 'two poi