;
                // Schema:
                var schema = [
                    {name: 'Income', index: 0, text: '人均收入', unit: '美元'},
                    {name: 'LifeExpectancy', index: 1, text: '人均寿命', unit: '岁'},
                    {name: 'Population', index: 2, text: '总人口', unit: ''},
                    {name: 'Country', index: 3, text: '国家', unit: ''}
                ];

                option = {
                    baseOption: {
                        timeline: {
   