diff --git a/TeXmacs/plugins/account/progs/liii/ocr.scm b/TeXmacs/plugins/account/progs/liii/ocr.scm
index 79581b4d8d..9cba025e87 100644
--- a/TeXmacs/plugins/account/progs/liii/ocr.scm
+++ b/TeXmacs/plugins/account/progs/liii/ocr.scm
@@ -98,7 +98,7 @@ t: tree
 |#
 (tm-define (ocr-to-latex-by-cursor t)
   (let* ((extension (get-image-extension (get-image t 0 #t)))
-         (temp-name (string-append temp-dir "/temp-" (number->string (current-time)) "." extension))
+         (temp-name (string-append temp-dir "/temp-" (number->string (texmacs-time)) "." extension))
          (data-list 
            (get-image t 0 #f)))
     (when (and (list? data-list) (not (null? data-list)))
@@ -140,7 +140,7 @@ t: tree
 |#
 (tm-define (ocr-to-latex-by-image t)
   (let* ((extention (get-image-extension (get-image t 0 #t)))
-         (temp-name (string-append temp-dir "/temp-" (number->string (current-time)) "." extention))
+         (temp-name (string-append temp-dir "/temp-" (number->string (texmacs-time)) "." extention))
          (data-list (get-image t 0 #f)))
     (when (and (list? data-list) (not (null? data-list)))
           (let* ((base64-str (car data-list))
diff --git a/devel/0387.md b/devel/0387.md
new file mode 100644
index 0000000000..91da032cca
--- /dev/null
+++ b/devel/0387.md
@@ -0,0 +1,47 @@
+# [0387] 修复聚光灯引导第三步（OCR 演示）启动报错
+
+## 1 相关文档
+- [dddd.md](dddd.md) - 任务文档模板
+
+## 2 任务相关的代码文件
+- TeXmacs/plugins/account/progs/liii/ocr.scm
+- TeXmacs/plugins/tutorial/data/first-launch-tutorial.json
+- TeXmacs/plugins/tutorial/progs/init-tutorial.scm
+
+## 3 如何测试
+
+### 3.1 确定性测试（单元测试）
+无
+
+### 3.2 非确定性测试（文档验证）
+1. 清理 `$TEXMACS_HOME_PATH` 目录
+2. 启动 stem，进入首次启动引导流程
+3. 推进到第三步并点击 OCR 按钮
+4. 应正常插入 LaTeX 代码片段，不再抛出 `number->string ... is a let but should be a number`
+
+## 4 如何提交
+
+提交前执行以下最少步骤：
+
+```bash
+xmake b stem
+gf fmt --changed-since=main
+git push
+```
+
+## 5 What
+修复聚光灯引导第三步（OCR 演示）触发时报错的问题。
+
+1. `TeXmacs/plugins/account/progs/liii/ocr.scm` 中 `ocr-to-latex-by-cursor`（第 101 行）和 `ocr-to-latex-by-image`（第 143 行）生成临时文件名时，把 `(number->string (current-time))` 改为 `(number->string (texmacs-time))`
+
+## 6 Why
+聚光灯引导第三步 `id: "ocr"` 的 `on-enter` 调用 `(tutorial-prepare-ocr-demo)`，用户在该步粘贴时进一步触发 `ocr-to-latex-by-cursor` / `ocr-to-latex-by-image`，两者在拼临时文件名时报错：
+
+```
+number->string first argument, (inlet '{gensym}-11121 <time> 'type time-utc ...), is a let but should be a number
+```
+
+根因：本仓库的 Scheme 环境里 `current-time` 是 SRFI-19 风格实现，返回 time record（`#<time type time-utc nanosecond ... second ...>`），不是整数；而 `number->string` 只接受数字。项目内其他位置（如 `TeXmacs/progs/init-research.scm`）统一使用返回整数毫秒的 `(texmacs-time)`，此处应与之保持一致。
+
+## 7 How
+两处临时文件名拼接都改为调用项目内置的 `(texmacs-time)`（返回整数毫秒），既能拿到合适的整数作为文件名后缀，又与仓库其他时间戳用法对齐，避免引入 SRFI-19 time record 的解析逻辑。