diff --git a/backend/internal/modules/listing/presenter.go b/backend/internal/modules/listing/presenter.go
index 38fb5a4..015de05 100644
--- a/backend/internal/modules/listing/presenter.go
+++ b/backend/internal/modules/listing/presenter.go
@@ -57,6 +57,7 @@ func normalizedListingPriceCent(req CreateRequest) int64 {
 func publicListings(items []ListingDTO) []ListingDTO {
 	for index := range items {
 		applyPublicListingURLs(&items[index])
+		applyPublicListingPrice(&items[index])
 	}
 	return items
 }
@@ -156,12 +157,47 @@ func applySellerListingPrice(item *ListingDTO) {
 		item.AssetSummary["publish_ratio"] = sellerRatio
 	}
 	delete(breakdown, "buyer_coin_base_price")
+	delete(breakdown, "buyer_coin_base_price_cent")
 	delete(breakdown, "buyer_total_price")
+	delete(breakdown, "buyer_total_price_cent")
 	delete(breakdown, "buyer_ratio")
+	delete(breakdown, "buyer_ratio_bps")
 	delete(breakdown, "platform_markup_amount")
+	delete(breakdown, "platform_markup_amount_cent")
 	delete(breakdown, "platform_rule_type")
 }
 
+// applyPublicListingPrice 只保留买家侧价格字段，隐藏卖家成本与平台加价。
+func applyPublicListingPrice(item *ListingDTO) {
+	if item == nil || item.AssetSummary == nil {
+		return
+	}
+	breakdown, ok := item.AssetSummary["price_breakdown"].(map[string]any)
+	if !ok {
+		return
+	}
+	for _, key := range []string{
+		"seller_reference_ratio",
+		"seller_reference_ratio_bps",
+		"seller_ratio",
+		"seller_ratio_bps",
+		"seller_coin_base_price",
+		"seller_coin_base_price_cent",
+		"seller_total_price",
+		"seller_total_price_cent",
+		"platform_markup_amount",
+		"platform_markup_amount_cent",
+		"platform_rule_type",
+		"admin_adjust_reason",
+		"admin_adjusted_at",
+		"admin_adjusted_by",
+		"site_receive_ratio_delta",
+		"site_receive_cost_delta",
+	} {
+		delete(breakdown, key)
+	}
+}
+
 func (row listingRow) toDTO() ListingDTO {
 	assetSummary := decodeAssetSummary(row.AssetSummary)
 	screenshotURLS := cleanScreenshotURLs(decodeScreenshots(row.ScreenshotURLS))
diff --git a/backend/internal/modules/listing/public_query.go b/backend/internal/modules/listing/public_query.go
index 2e2dac7..43dca0d 100644
--- a/backend/internal/modules/listing/public_query.go
+++ b/backend/internal/modules/listing/public_query.go
@@ -239,6 +239,7 @@ func (r *Repository) FindPublic(ctx context.Context, id uint64, siteCode string)
 		return nil, err
 	}
 	applyPublicListingURLs(dto)
+	applyPublicListingPrice(dto)
 	items := []ListingDTO{*dto}
 	if err := r.applyShelfMarkup(ctx, siteCode, items); err != nil {
 		return nil, err
diff --git a/backend/internal/modules/listing/query.go b/backend/internal/modules/listing/query.go
index 4b351eb..797062d 100644
--- a/backend/internal/modules/listing/query.go
+++ b/backend/internal/modules/listing/query.go
@@ -258,11 +258,21 @@ func (r *Repository) findForReviewUpdate(tx *gorm.DB, listingID uint64) (*model.
 func (r *Repository) nextListingNo(tx *gorm.DB, now time.Time) (string, error) {
 	bizDate := now.Format("20060102")
 	if tx.Dialector.Name() == "mysql" {
+		// 以当天已有编号的最大值为兜底，避免种子数据或外部写入后序列落后导致编号冲突。
+		var maxSeq int
+		if err := tx.Raw(
+			`SELECT COALESCE(MAX(CAST(SUBSTRING(listing_no, 9) AS UNSIGNED)), 0)
+			 FROM rental_listings WHERE listing_no LIKE ?`,
+			bizDate+"%",
+		).Scan(&maxSeq).Error; err != nil {
+			return "", err
+		}
+		nextSeq := maxSeq + 1
 		if err := tx.Exec(`
 			INSERT INTO listing_no_sequences (biz_date, next_seq)
-			VALUES (?, LAST_INSERT_ID(1))
-			ON DUPLICATE KEY UPDATE next_seq = LAST_INSERT_ID(next_seq + 1)
-		`, bizDate).Error; err != nil {
+			VALUES (?, LAST_INSERT_ID(?))
+			ON DUPLICATE KEY UPDATE next_seq = LAST_INSERT_ID(GREATEST(next_seq + 1, ?))
+		`, bizDate, nextSeq, nextSeq).Error; err != nil {
 			return "", err
 		}
 		var seq int