echarts饼图中间添加文字

加到option配置里
title: {
                        text: "2673682",
                        left: "center",
                        top: "50%",
                        textStyle: {
                            textAlign: "center",
                            fill: "#333",
                            fontSize: 12,
                            fontWeight: 400,
                        }
                    },
      graphic: {
                        type: "text",
                        left: "center",
                        top: "40%",
                        style: {
                            text: "资产总数",
                            textAlign: "center",
                            fill: "#333",
                            fontSize: 14,
                        }
                    },