diff --git a/backend/sql/08_trade.sql b/backend/sql/08_trade.sql
index a1c541d..aebacca 100644
--- a/backend/sql/08_trade.sql
+++ b/backend/sql/08_trade.sql
@@ -66,6 +66,25 @@ BEGIN
     ELSE
         RAISE NOTICE '3️⃣⏩ open_date 子表已存在，跳过';
     END IF;
+
+    -- variety 子表
+    IF NOT EXISTS (SELECT 1 FROM information_schema.tables WHERE table_name = 'trade_variety') THEN
+        CREATE TABLE variety (
+            id UUID DEFAULT gen_random_uuid() PRIMARY KEY,
+            trade_id UUID NOT NULL,
+            variety_id UUID NOT NULL,
+            variety_name VARCHAR NOT NULL,
+            deleted BOOLEAN NOT NULL DEFAULT FALSE,
+            created_at TIMESTAMPTZ NOT NULL DEFAULT CURRENT_TIMESTAMP,
+            updated_at TIMESTAMPTZ NOT NULL DEFAULT CURRENT_TIMESTAMP
+        );
+        CREATE TRIGGER update_variety_updated_at
+            BEFORE UPDATE ON variety
+            FOR EACH ROW EXECUTE FUNCTION update_data_modified_column();
+        RAISE NOTICE '4️⃣✅ variety 子表已创建';
+    ELSE
+        RAISE NOTICE '4️⃣⏩ variety 子表已存在，跳过';
+    END IF;
 END $$;
 
 -- 4️⃣ 视图 ------------------------------------
@@ -76,10 +95,12 @@ SELECT
     r.remark AS remark,
     od.year AS open_year,
     od.month AS open_month,
-    od.day AS open_day
+    od.day AS open_day,
+    v.variety_name AS variety_name
 FROM trade t
 LEFT JOIN remark r ON t.id = r.trade_id AND r.deleted = FALSE
 LEFT JOIN open_date od ON t.id = od.trade_id AND od.deleted = FALSE
+LEFT JOIN variety v ON t.id = v.trade_id AND v.deleted = FALSE
 WHERE t.deleted = FALSE;
 
 RAISE NOTICE '4️⃣✅ trade_info_view 已创建/更新';
@@ -87,6 +108,7 @@ RAISE NOTICE '4️⃣✅ trade_info_view 已创建/更新';
 -- 5️⃣ 性能索引 ------------------------------------------------
 CREATE INDEX IF NOT EXISTS idx_remark_trade_id_deleted ON remark(trade_id, deleted);
 CREATE INDEX IF NOT EXISTS idx_open_date_trade_id_deleted ON open_date(trade_id, deleted);
+CREATE INDEX IF NOT EXISTS idx_variety_trade_id_deleted ON variety(trade_id, deleted);
 
 RAISE NOTICE '5️⃣✅ 全部索引已确保存在';
 
diff --git a/backend/提示词条.md b/backend/提示词条.md
index b3d6c2c..cfb903f 100644
--- a/backend/提示词条.md
+++ b/backend/提示词条.md
@@ -31,4 +31,12 @@
 3、确认提交的 page，page_size, 如果为空，则 page 默认为 1，page_size 默认为20。
 3、根据参数去 country_info_view 中查找数据，并做分页查询。
 4、将查找的数据分页返回。
+---
+读取./sql/08_trade.sql，然后多加一个子表，子表名叫trade_variety，子表逻辑字段为:
+id UUID DEFAULT gen_random_uuid() PRIMARY KEY，
+variety_id UUID NOT NULL,
+variety_name VARCHAR NOT NULL,
+deleted BOOLEAN NOT NULL DEFAULT FALSE,
+created_at TIMESTAMPTZ NOT NULL DEFAULT CURRENT_TIMESTAMP,
+updated_at TIMESTAMPTZ NOT NULL DEFAULT CURRENT_TIMESTAMP
 ---
\ No newline at end of file