            p.width = 3000;
            p.height = 3000;
            p.canvasWidth = 512;
            p.canvasHeight = 512;
            // p.color = [0.5, 0.8, 1, 2];

            var container = document.createElement('div');
            container.style.width = '512px';
            container.style.height = '512px';

            // 基于准备好的dom，初始化echarts实例
            var myChart = echarts.init(container);
            option = {
                backgroundColor: 'rgba(255, 