diff --git a/echarts.go b/echarts.go
index 19659a8..ecad892 100644
--- a/echarts.go
+++ b/echarts.go
@@ -209,11 +209,33 @@ type EChartsLegend struct {
 	TextStyle EChartsTextStyle `json:"textStyle"`
 }
 
+type EChartsMarkData struct {
+	Type string `json:"type"`
+}
+type _EChartsMarkData EChartsMarkData
+
+func (emd *EChartsMarkData) UnmarshalJSON(data []byte) error {
+	data = bytes.TrimSpace(data)
+	if len(data) == 0 {
+		return nil
+	}
+	data = convertToArray(data)
+	ds := make([]*_EChartsMarkData, 0)
+	err := json.Unmarshal(data, &ds)
+	if err != nil {
+		return err
+	}
+	for _, d := range ds {
+		if d.Type != "" {
+			emd.Type = d.Type
+		}
+	}
+	return nil
+}
+
 type EChartsMarkPoint struct {
-	SymbolSize int `json:"symbolSize"`
-	Data       []struct {
-		Type string `json:"type"`
-	} `json:"data"`
+	SymbolSize int               `json:"symbolSize"`
+	Data       []EChartsMarkData `json:"data"`
 }
 
 func (emp *EChartsMarkPoint) ToSeriesMarkPoint() SeriesMarkPoint {
diff --git a/echarts_test.go b/echarts_test.go
index e484b85..f3b70f1 100644
--- a/echarts_test.go
+++ b/echarts_test.go
@@ -330,6 +330,20 @@ func TestEChartsSeries(t *testing.T) {
 	}, esList)
 }
 
+func TestEChartsMarkData(t *testing.T) {
+	assert := assert.New(t)
+
+	emd := EChartsMarkData{}
+	err := emd.UnmarshalJSON([]byte(`{"type": "average"}`))
+	assert.Nil(err)
+	assert.Equal("average", emd.Type)
+
+	emd = EChartsMarkData{}
+	err = emd.UnmarshalJSON([]byte(`[{}, {"type": "average"}]`))
+	assert.Nil(err)
+	assert.Equal("average", emd.Type)
+}
+
 func TestEChartsMarkPoint(t *testing.T) {
 	assert := assert.New(t)