diff --git a/internal/domains/api/services/processors/qcxg/qcxg7k2n_plate_type.go b/internal/domains/api/services/processors/qcxg/qcxg7k2n_plate_type.go
index 6e86e46..d814b48 100644
--- a/internal/domains/api/services/processors/qcxg/qcxg7k2n_plate_type.go
+++ b/internal/domains/api/services/processors/qcxg/qcxg7k2n_plate_type.go
@@ -4,16 +4,6 @@ import "strings"
 
 const defaultPlateType = "02"
 
-// plateTypeToPlateColor 将车牌类型编码转换为 ETC 人车关系核验所需的车牌颜色。
-func plateTypeToPlateColor(plateType string) string {
-	code := normalizePlateType(plateType)
-	if color, ok := plateTypePlateColorMap[code]; ok {
-		return color
-	}
-	return "0"
-}
-
-// normalizePlateType 归一化车牌类型，空值默认小型汽车（02）。
 func normalizePlateType(plateType string) string {
 	code := strings.TrimSpace(plateType)
 	if code == "" {
@@ -22,8 +12,18 @@ func normalizePlateType(plateType string) string {
 	return code
 }
 
-// plateTypePlateColorMap 车牌类型 -> ETC 车牌颜色
-// 0蓝 1黄 2黑 3白 4渐变绿 5黄绿双拼 6蓝白渐变 7临时 11绿 12红
+func etcPlateColorParam(plateType string) (color string, include bool) {
+	code := strings.TrimSpace(plateType)
+	if code == "" || code == "02" {
+		return "", false
+	}
+	color, ok := plateTypePlateColorMap[code]
+	if !ok || color == "0" {
+		return "", false
+	}
+	return color, true
+}
+
 var plateTypePlateColorMap = map[string]string{
 	"01": "1",
 	"02": "0",
@@ -51,3 +51,26 @@ var plateTypePlateColorMap = map[string]string{
 	"51": "5",
 	"52": "11",
 }
+
+func buildETCShujubaoParams(plateNo, name, plateType string) map[string]interface{} {
+	params := map[string]interface{}{
+		"key":   "a2f32fc54b44ebc85b97a2aaff1734ec",
+		"carNo": plateNo,
+		"name":  name,
+	}
+	if color, include := etcPlateColorParam(plateType); include {
+		params["plateColor"] = color
+	}
+	return params
+}
+
+func buildETCTianyuanParams(plateNo, name, plateType string) map[string]string {
+	params := map[string]string{
+		"plate_no": plateNo,
+		"name":     name,
+	}
+	if color, include := etcPlateColorParam(plateType); include {
+		params["plate_color"] = color
+	}
+	return params
+}
diff --git a/internal/domains/api/services/processors/qcxg/qcxg7k2n_processor.go b/internal/domains/api/services/processors/qcxg/qcxg7k2n_processor.go
index 8e719da..82f8935 100644
--- a/internal/domains/api/services/processors/qcxg/qcxg7k2n_processor.go
+++ b/internal/domains/api/services/processors/qcxg/qcxg7k2n_processor.go
@@ -23,11 +23,7 @@ func ProcessQCXG7K2NRequest(ctx context.Context, params []byte, deps *processors
 
 	plateType := normalizePlateType(paramsDto.PlateType)
 
-	etcParams, err := json.Marshal(map[string]string{
-		"plate_no":    paramsDto.PlateNo,
-		"name":        paramsDto.Name,
-		"plate_color": plateTypeToPlateColor(paramsDto.PlateType),
-	})
+	etcParams, err := json.Marshal(buildETCTianyuanParams(paramsDto.PlateNo, paramsDto.Name, paramsDto.PlateType))
 	if err != nil {
 		return nil, errors.Join(processors.ErrSystem, err)
 	}