diff --git a/platformapi/mtwmapi/order.go b/platformapi/mtwmapi/order.go
index c52a554e..cafe4e57 100644
--- a/platformapi/mtwmapi/order.go
+++ b/platformapi/mtwmapi/order.go
@@ -147,3 +147,10 @@ func (a *API) OrderBatchPullPhoneNumber(poiCode string, offset, limit int) (real
 	}
 	return nil, err
 }
+
+func (a *API) OrderLogisticsChange2Self(orderID int64) (err error) {
+	_, err = a.AccessAPI("order/logistics/change/poi_self", true, map[string]interface{}{
+		KeyOrderID: orderID,
+	})
+	return err
+}
diff --git a/utils/typeconv.go b/utils/typeconv.go
index 13f167cf..2136d3fc 100644
--- a/utils/typeconv.go
+++ b/utils/typeconv.go
@@ -3,6 +3,7 @@ package utils
 import (
 	"bytes"
 	"encoding/json"
+	"errors"
 	"fmt"
 	"net/url"
 	"reflect"
@@ -69,12 +70,29 @@ func MustMarshal(obj interface{}) []byte {
 	return byteArr
 }
 
-func MustInterface2Int64(data interface{}) int64 {
+func TryInterface2Int64(data interface{}) (num int64, err error) {
+	if data == nil {
+		return num, errors.New("data is nil")
+	}
+	if dataNumber, ok := data.(int64); ok {
+		return dataNumber, nil
+	}
+	if dataNumber, ok := data.(int); ok {
+		return int64(dataNumber), nil
+	}
 	dataNumber, ok := data.(json.Number)
 	if !ok {
-		panic(fmt.Sprintf("error when cast:%v to int64", data))
+		return 0, fmt.Errorf("data is not json.Number:%v to int64", data)
 	}
 	retVal, err := dataNumber.Int64()
+	if err != nil {
+		return num, err
+	}
+	return retVal, nil
+}
+
+func MustInterface2Int64(data interface{}) int64 {
+	retVal, err := TryInterface2Int64(data)
 	if err != nil {
 		panic(err.Error())
 	}
@@ -82,10 +100,11 @@ func MustInterface2Int64(data interface{}) int64 {
 }
 
 func Interface2Int64WithDefault(data interface{}, defValue int64) int64 {
-	if data == nil {
+	retVal, err := TryInterface2Int64(data)
+	if err != nil {
 		return defValue
 	}
-	return MustInterface2Int64(data)
+	return retVal
 }
 
 func Interface2DirectIntWithDefault(data interface{}, defValue int) int {
@@ -95,12 +114,29 @@ func Interface2DirectIntWithDefault(data interface{}, defValue int) int {
 	return data.(int)
 }
 
-func MustInterface2Float64(data interface{}) float64 {
+func TryInterface2Float64(data interface{}) (num float64, err error) {
+	if data == nil {
+		return num, errors.New("data is nil")
+	}
+	if dataNumber, ok := data.(float64); ok {
+		return dataNumber, nil
+	}
+	if dataNumber, ok := data.(float32); ok {
+		return float64(dataNumber), nil
+	}
 	dataNumber, ok := data.(json.Number)
 	if !ok {
-		panic(fmt.Sprintf("error when convert:%v", data))
+		return num, fmt.Errorf("data is not json.Number:%v", data)
 	}
 	retVal, err := dataNumber.Float64()
+	if err != nil {
+		return num, err
+	}
+	return retVal, nil
+}
+
+func MustInterface2Float64(data interface{}) float64 {
+	retVal, err := TryInterface2Float64(data)
 	if err != nil {
 		panic(err.Error())
 	}
@@ -108,10 +144,11 @@ func MustInterface2Float64(data interface{}) float64 {
 }
 
 func Interface2FloatWithDefault(data interface{}, defValue float64) (retVal float64) {
-	if _, ok := data.(json.Number); !ok {
+	retVal, err := TryInterface2Float64(data)
+	if err != nil {
 		return defValue
 	}
-	return MustInterface2Float64(data)
+	return retVal
 }
 
 func Interface2String(data interface{}) string {
diff --git a/utils/typeconv_test.go b/utils/typeconv_test.go
new file mode 100644
index 00000000..38548c7f
--- /dev/null
+++ b/utils/typeconv_test.go
@@ -0,0 +1,32 @@
+package utils
+
+import (
+	"encoding/json"
+	"testing"
+)
+
+func TestConv(t *testing.T) {
+	for _, v := range [][]interface{}{
+		[]interface{}{
+			json.Number("123"),
+			int64(123),
+		},
+		[]interface{}{
+			json.Number("abc"),
+			int64(0),
+		},
+		[]interface{}{
+			"123",
+			int64(0),
+		},
+		[]interface{}{
+			int64(123),
+			int64(123),
+		},
+	} {
+		data := Interface2Int64WithDefault(v[0], 0)
+		if data != v[1].(int64) {
+			t.Fatal("Interface2Int64WithDefault failed")
+		}
+	}
+}