diff --git a/miniprogram/pages/read/read.js b/miniprogram/pages/read/read.js
index ea5933f3..8a8359b1 100644
--- a/miniprogram/pages/read/read.js
+++ b/miniprogram/pages/read/read.js
@@ -39,6 +39,14 @@ function getContentParseConfig() {
 }
 
 /** 补全 mentionDisplay，避免旧数据无字段；昵称去空白防「@ 名」 */
+/** 付费墙「已阅读 x%」：与章节接口 previewPercent 一致（未全文解锁时），缺省 20 */
+function normalizePreviewPercent(res) {
+  const p = res && res.previewPercent
+  const n = typeof p === 'number' ? Math.round(p) : parseInt(String(p), 10)
+  if (!isNaN(n) && n >= 1 && n <= 100) return n
+  return 20
+}
+
 function normalizeMentionSegments(segments) {
   if (!Array.isArray(segments)) return []
   return segments.map((row) => {
@@ -85,6 +93,8 @@ Page({
     
     // 阅读进度
     readingProgress: 0,
+    /** 未解锁时付费墙展示：与 /api/miniprogram/book/chapter/* 的 previewPercent 对齐 */
+    previewPercent: 20,
     showPaywall: false,
     
     // 上一篇/下一篇
@@ -425,7 +435,8 @@ Page({
           contentSegments: normalizeMentionSegments(segments),
           previewParagraphs: lines.slice(0, previewCount),
           partTitle: res.partTitle || '',
-          chapterTitle: res.chapterTitle || ''
+          chapterTitle: res.chapterTitle || '',
+          previewPercent: normalizePreviewPercent(res),
         }
         if (res.mid) updates.sectionMid = res.mid
         this.setData(updates)
@@ -451,7 +462,8 @@ Page({
             contentSegments: normalizeMentionSegments(segments),
             previewParagraphs: lines.slice(0, previewCount),
             partTitle: cached.partTitle || '',
-            chapterTitle: cached.chapterTitle || ''
+            chapterTitle: cached.chapterTitle || '',
+            previewPercent: normalizePreviewPercent(cached),
           })
           app.touchRecentSection(id)
           console.log('[Read] 从本地缓存加载成功')
@@ -571,7 +583,8 @@ Page({
       previewParagraphs: lines.slice(0, previewCount),
       partTitle: res.partTitle || '',
       // 导航栏、分享等使用的文章标题，同样统一为 sectionTitle
-      chapterTitle: sectionTitle
+      chapterTitle: sectionTitle,
+      previewPercent: normalizePreviewPercent(res),
     })
   },
   
diff --git a/miniprogram/pages/read/read.wxml b/miniprogram/pages/read/read.wxml
index 638654dd..2fcb929c 100644
--- a/miniprogram/pages/read/read.wxml
+++ b/miniprogram/pages/read/read.wxml
@@ -140,7 +140,7 @@
 
         <block wx:else>
           <text class="paywall-title">解锁完整内容</text>
-          <text class="paywall-desc">已预览部分内容，登录并支付 ¥1 后阅读全文</text>
+          <text class="paywall-desc">已阅读{{previewPercent}}%，登录并支付 ¥{{section && section.price != null ? section.price : sectionPrice}} 后阅读全文</text>
           <view class="purchase-options" wx:if="{{!auditMode}}">
             <view class="purchase-btn purchase-section" bindtap="handlePurchaseSection">
               <text class="btn-label">购买本章</text>
@@ -212,7 +212,7 @@
 
         <block wx:else>
           <text class="paywall-title">解锁完整内容</text>
-          <text class="paywall-desc">已阅读50%，购买后继续阅读</text>
+          <text class="paywall-desc">已阅读{{previewPercent}}%，购买后继续阅读</text>
           <view class="purchase-options" wx:if="{{!auditMode}}">
             <view class="purchase-btn purchase-section" bindtap="handlePurchaseSection">
               <text class="btn-label">购买本章</text>
diff --git a/soul-api/internal/handler/book.go b/soul-api/internal/handler/book.go
index 705dfbc8..11bd0d40 100644
--- a/soul-api/internal/handler/book.go
+++ b/soul-api/internal/handler/book.go
@@ -710,14 +710,14 @@ func findChapterAndRespond(c *gin.Context, whereFn func(*gorm.DB) *gorm.DB) {
 	// 确定返回的 content：免费直接返回，付费须校验购买权限
 	userID := c.Query("userId")
 	isPremium := ch.EditionPremium != nil && *ch.EditionPremium
+	hasFullAccess := isFree || checkUserChapterAccess(db, userID, ch.ID, isPremium)
 	var returnContent string
-	if isFree {
-		returnContent = ch.Content
-	} else if checkUserChapterAccess(db, userID, ch.ID, isPremium) {
+	var unpaidPreviewPercent int // 未解锁时试读比例（system_config.unpaid_preview_percent）；已解锁时不写入响应
+	if hasFullAccess {
 		returnContent = ch.Content
 	} else {
-		percent := getUnpaidPreviewPercent(db)
-		returnContent = previewContent(ch.Content, percent)
+		unpaidPreviewPercent = getUnpaidPreviewPercent(db)
+		returnContent = previewContent(ch.Content, unpaidPreviewPercent)
 	}
 
 	// data 中的 content 必须与外层 content 一致，避免泄露完整内容给未授权用户
@@ -728,15 +728,19 @@ func findChapterAndRespond(c *gin.Context, whereFn func(*gorm.DB) *gorm.DB) {
 	chForResponse.SectionTitle = sanitizeChapterTitleField(ch.SectionTitle)
 
 	out := gin.H{
-		"success":      true,
-		"data":         chForResponse,
-		"content":      returnContent,
-		"chapterTitle": chForResponse.ChapterTitle,
-		"partTitle":    chForResponse.PartTitle,
-		"id":           ch.ID,
-		"mid":          ch.MID,
-		"sectionTitle": chForResponse.SectionTitle,
-		"isFree":       isFree,
+		"success":       true,
+		"data":          chForResponse,
+		"content":       returnContent,
+		"chapterTitle":  chForResponse.ChapterTitle,
+		"partTitle":     chForResponse.PartTitle,
+		"id":            ch.ID,
+		"mid":           ch.MID,
+		"sectionTitle":  chForResponse.SectionTitle,
+		"isFree":        isFree,
+		"hasFullAccess": hasFullAccess,
+	}
+	if !hasFullAccess {
+		out["previewPercent"] = unpaidPreviewPercent
 	}
 	// 文章详情内直接输出上一篇/下一篇，省去单独请求
 	if list := getOrderedChapterList(); len(list) > 0 {