diff --git a/src/api/jingdong.ts b/src/api/jingdong.ts
index e939e20..9fbfa7d 100644
--- a/src/api/jingdong.ts
+++ b/src/api/jingdong.ts
@@ -115,6 +115,8 @@ export interface ImageGenSubmitInput {
   pose_id?: number
   /** 效果图编辑 edit；原图编辑 / 普通立即生成 generate */
   mode?: 'generate' | 'edit'
+  /** 主体数量文案，来自 orders/stat.subject_name，如「1人」「2人+1宠物」 */
+  subject_name?: string
 }
 
 export interface ImageGenImage {
@@ -774,6 +776,7 @@ export const submitImageGen = (input: ImageGenSubmitInput) => {
       proportion_id: input.proportion_id ?? 0,
       pose_id: input.pose_id ?? 0,
       mode: input.mode || 'generate',
+      subject_name: input.subject_name || '',
     },
   }) as Promise<ImageGenTask>
 }
diff --git a/src/views/jingdong/index.vue b/src/views/jingdong/index.vue
index eec5696..2d580d0 100644
--- a/src/views/jingdong/index.vue
+++ b/src/views/jingdong/index.vue
@@ -801,6 +801,10 @@ async function startGenerate(opts: {
       n: 1,
       mode: opts.mode,
       scene_prop: sceneProp,
+      // 主体数量：沿用 orders/stat.subject_name
+      subject_name:
+        subjectNameFromStat.value ||
+        String(orderStat.value?.subject_name || '').trim(),
     })
     let taskId = task.task_id
     if (!taskId) throw new Error('提交生成失败')