diff --git a/internal/domains/api/dto/api_request_dto.go b/internal/domains/api/dto/api_request_dto.go
index 4ef0685..c1c54e3 100644
--- a/internal/domains/api/dto/api_request_dto.go
+++ b/internal/domains/api/dto/api_request_dto.go
@@ -139,8 +139,9 @@ type QCXGX2X6Req struct {
 	Name        string `json:"name" validate:"required,min=1,validName"`
 }
 type QCXG7K2NReq struct {
-	PlateNo string `json:"plate_no" validate:"required"`
-	Name    string `json:"name" validate:"required,min=1,validName"`
+	PlateNo   string `json:"plate_no" validate:"required"`
+	Name      string `json:"name" validate:"required,min=1,validName"`
+	PlateType string `json:"plate_type" validate:"omitempty,oneof=01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 20 21 22 23 24 38 51 52"`
 }
 type QCXG1S2LReq struct {
 	VinCode string `json:"vin_code" validate:"required"`
diff --git a/internal/domains/api/services/processors/qcxg/qcxg7k2n_plate_type.go b/internal/domains/api/services/processors/qcxg/qcxg7k2n_plate_type.go
new file mode 100644
index 0000000..6e86e46
--- /dev/null
+++ b/internal/domains/api/services/processors/qcxg/qcxg7k2n_plate_type.go
@@ -0,0 +1,53 @@
+package qcxg
+
+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 == "" {
+		return defaultPlateType
+	}
+	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
+var plateTypePlateColorMap = map[string]string{
+	"01": "1",
+	"02": "0",
+	"03": "2",
+	"04": "2",
+	"05": "2",
+	"06": "2",
+	"07": "1",
+	"08": "0",
+	"09": "2",
+	"10": "2",
+	"11": "2",
+	"12": "2",
+	"13": "1",
+	"14": "1",
+	"15": "1",
+	"16": "1",
+	"17": "1",
+	"20": "7",
+	"21": "7",
+	"22": "7",
+	"23": "3",
+	"24": "3",
+	"38": "0",
+	"51": "5",
+	"52": "11",
+}
diff --git a/internal/domains/api/services/processors/qcxg/qcxg7k2n_processor.go b/internal/domains/api/services/processors/qcxg/qcxg7k2n_processor.go
index bcdba6a..8e719da 100644
--- a/internal/domains/api/services/processors/qcxg/qcxg7k2n_processor.go
+++ b/internal/domains/api/services/processors/qcxg/qcxg7k2n_processor.go
@@ -21,12 +21,18 @@ func ProcessQCXG7K2NRequest(ctx context.Context, params []byte, deps *processors
 		return nil, errors.Join(processors.ErrInvalidParam, err)
 	}
 
-	reqParams, err := json.Marshal(paramsDto)
+	plateType := normalizePlateType(paramsDto.PlateType)
+
+	etcParams, err := json.Marshal(map[string]string{
+		"plate_no":    paramsDto.PlateNo,
+		"name":        paramsDto.Name,
+		"plate_color": plateTypeToPlateColor(paramsDto.PlateType),
+	})
 	if err != nil {
 		return nil, errors.Join(processors.ErrSystem, err)
 	}
 
-	respBytes, err := processors.CallTianyuanByProduct(ctx, deps, "QCXG3M7Z", reqParams)
+	respBytes, err := processors.CallTianyuanByProduct(ctx, deps, "QCXG3M7Z", etcParams)
 	if err == nil {
 		return respBytes, nil
 	}
@@ -34,7 +40,16 @@ func ProcessQCXG7K2NRequest(ctx context.Context, params []byte, deps *processors
 		return nil, err
 	}
 
-	respBytes, err = ProcessQCXGX2X6Request(ctx, reqParams, deps)
+	x2x6Params, err := json.Marshal(dto.QCXGX2X6Req{
+		PlateNo:     paramsDto.PlateNo,
+		Name:        paramsDto.Name,
+		VehicleType: plateType,
+	})
+	if err != nil {
+		return nil, errors.Join(processors.ErrSystem, err)
+	}
+
+	respBytes, err = ProcessQCXGX2X6Request(ctx, x2x6Params, deps)
 	if err != nil {
 		return nil, err
 	}