diff --git a/biz/service/seed/annotate.go b/biz/service/seed/annotate.go
new file mode 100644
index 0000000..089c94f
--- /dev/null
+++ b/biz/service/seed/annotate.go
@@ -0,0 +1,49 @@
+package seed
+
+import (
+	"context"
+
+	"github.com/gogf/gf/v2/database/gdb"
+	"github.com/gogf/gf/v2/frame/g"
+
+	"36wisdom/biz/consts"
+	"36wisdom/common"
+)
+
+// annotateAll 拼音补标：对 *_pinyin 为空的记录按原文标注。
+// 启动维护一次性（约 500 行），单事务内逐行 UPDATE，失败告警不阻断。
+// 注意：迁移补列的历史记录为 NULL，须同时匹配 '' 与 NULL。
+func annotateAll(ctx context.Context) {
+	type target struct{ table, pinyinCol, textCol string }
+	targets := []target{
+		{consts.TableStrategy, "meaning_pinyin", "meaning"},
+		{consts.TableStrategy, "teach_content_pinyin", "teach_content"},
+		{consts.TableStrategy, "summary_q_pinyin", "summary_q"},
+		{consts.TableStrategy, "summary_options_pinyin", "summary_options"},
+		{consts.TableLevel, "scene_content_pinyin", "scene_content"},
+		{consts.TableSceneNode, "content_pinyin", "content"},
+		{consts.TableNodeOption, "text_pinyin", "text"},
+		{consts.TableNodeOption, "feedback_pinyin", "feedback"},
+		{consts.TableElement, "name_pinyin", "name"},
+		{consts.TableElement, "description_pinyin", "description"},
+	}
+	if err := g.DB().Transaction(ctx, func(ctx context.Context, tx gdb.TX) error {
+		for _, t := range targets {
+			recs, err := tx.Model(t.table).Ctx(ctx).Where(t.pinyinCol, "").WhereOr(t.pinyinCol, nil).Fields("id," + t.textCol).All()
+			if err != nil {
+				return err
+			}
+			for _, rec := range recs {
+				if _, err := tx.Model(t.table).Ctx(ctx).WherePri(rec["id"].Int64()).
+					Data(g.Map{t.pinyinCol: common.AnnotatePinyin(rec[t.textCol].String())}).Update(); err != nil {
+					return err
+				}
+			}
+		}
+		return nil
+	}); err != nil {
+		g.Log().Warningf(ctx, "seed: 拼音补标失败: %v", err)
+		return
+	}
+	g.Log().Info(ctx, "seed: 拼音补标完成")
+}
diff --git a/biz/service/seed/seed.go b/biz/service/seed/seed.go
index feacaa0..683175a 100644
--- a/biz/service/seed/seed.go
+++ b/biz/service/seed/seed.go
@@ -16,6 +16,7 @@ import (
 
 	"36wisdom/biz/consts"
 	"36wisdom/biz/dao"
+	"36wisdom/common"
 )
 
 //go:embed seed_36_ji/*.json
@@ -122,12 +123,14 @@ func EnsureSeeded(ctx context.Context) {
 	}
 	if count > 0 {
 		g.Log().Info(ctx, "seed: 数据已存在，跳过种子导入")
-		return
+	} else {
+		if err := doSeed(ctx); err != nil {
+			g.Log().Fatal(ctx, err)
+		}
+		g.Log().Info(ctx, "seed: 种子数据导入完成")
 	}
-	if err := doSeed(ctx); err != nil {
-		g.Log().Fatal(ctx, err)
-	}
-	g.Log().Info(ctx, "seed: 种子数据导入完成")
+	annotateAll(ctx)
+	// ensureInteractions(ctx) // Task 4 打开
 }
 
 func doSeed(ctx context.Context) (err error) {
@@ -206,8 +209,10 @@ func insertElement(ctx context.Context, tx gdb.TX, ids map[string]int64, el seed
 		return nil
 	}
 	res, err := tx.Model(consts.TableElement).Ctx(ctx).Data(g.Map{
-		"e_type": el.EType, "name": el.Name, "image": el.Image, "audio": el.Audio,
-		"description": el.Description, "status": consts.StatusEnabled,
+		"e_type": el.EType, "name": el.Name, "name_pinyin": common.AnnotatePinyin(el.Name),
+		"image": el.Image, "audio": el.Audio,
+		"description": el.Description, "description_pinyin": common.AnnotatePinyin(el.Description),
+		"status": consts.StatusEnabled,
 	}).Insert()
 	if err != nil {
 		return err
@@ -235,8 +240,11 @@ func insertStrategy(ctx context.Context, tx gdb.TX, elementIds map[string]int64,
 	unlockBefore := gconv.Int64(s.UnlockBefore)
 	data := g.Map{
 		"name": s.Name, "pinyin": s.Pinyin, "group_no": s.GroupNo, "group_name": s.GroupName,
-		"meaning": s.Meaning, "teach_content": s.TeachContent, "teach_image": s.TeachImage,
-		"teach_audio": s.TeachAudio, "summary_q": s.SummaryQ, "summary_options": s.SummaryOptions,
+		"meaning": s.Meaning, "meaning_pinyin": common.AnnotatePinyin(s.Meaning),
+		"teach_content": s.TeachContent, "teach_content_pinyin": common.AnnotatePinyin(s.TeachContent),
+		"teach_image": s.TeachImage,
+		"teach_audio": s.TeachAudio, "summary_q": s.SummaryQ, "summary_q_pinyin": common.AnnotatePinyin(s.SummaryQ),
+		"summary_options": s.SummaryOptions, "summary_options_pinyin": common.AnnotatePinyin(s.SummaryOptions),
 		"summary_audio": s.SummaryAudio, "icon": s.Icon, "sort_order": s.SortOrder,
 		"status": consts.StatusEnabled,
 	}
@@ -279,7 +287,8 @@ func insertLevel(ctx context.Context, tx gdb.TX, elementIds map[string]int64, st
 	}
 	res, err := tx.Model(consts.TableLevel).Ctx(ctx).Data(g.Map{
 		"strategy_id": strategyId, "title": lv.Title, "scene_id": sceneId,
-		"scene_content": lv.SceneContent, "scene_image": lv.SceneImage, "scene_audio": lv.SceneAudio,
+		"scene_content": lv.SceneContent, "scene_content_pinyin": common.AnnotatePinyin(lv.SceneContent),
+		"scene_image": lv.SceneImage, "scene_audio": lv.SceneAudio,
 		"age_group": ageGroup, "content_version": 1, "sort_order": sortOrder,
 		"status": consts.StatusEnabled,
 	}).Insert()
@@ -334,8 +343,10 @@ func insertLevel(ctx context.Context, tx gdb.TX, elementIds map[string]int64, st
 				nextNodeId = nodeIds[opt.NextIndex]
 			}
 			if _, err := tx.Model(consts.TableNodeOption).Ctx(ctx).Data(g.Map{
-				"node_id": nodeIds[i], "text": opt.Text, "prop_id": propId,
+				"node_id": nodeIds[i], "text": opt.Text, "text_pinyin": common.AnnotatePinyin(opt.Text),
+				"prop_id": propId,
 				"audio": opt.Audio, "next_node_id": nextNodeId, "feedback": opt.Feedback,
+				"feedback_pinyin": common.AnnotatePinyin(opt.Feedback),
 				"feedback_audio": opt.FeedbackAudio, "sort_order": oi + 1,
 				"status": consts.StatusEnabled,
 			}).Insert(); err != nil {