diff --git a/README.md b/README.md
index f3e78ff..bf4a077 100644
--- a/README.md
+++ b/README.md
@@ -2,6 +2,9 @@
 
 [中文说明](README.zh-CN.md)
 
+[![Public source checks](https://github.com/fooklook/pgsync-studio/actions/workflows/ci.yml/badge.svg)](https://github.com/fooklook/pgsync-studio/actions/workflows/ci.yml)
+[![License: MIT](https://img.shields.io/badge/License-MIT-blue.svg)](LICENSE)
+
 A web console and document assembly engine for synchronizing PostgreSQL data
 into Elasticsearch. Configure connections, join related tables across databases,
 build a full baseline, and keep the resulting documents up to date.
@@ -26,6 +29,14 @@ The current Web UI is in Simplified Chinese; the public setup documentation is b
 Studio connections support PostgreSQL. The upstream command-line code is retained;
 its wider backend support is not a compatibility claim for the Studio interface.
 
+## A quick look
+
+![Studio task list with the stopped synthetic book-catalog job](docs/images/demo-jobs.jpg)
+
+The UI currently uses Simplified Chinese. This screenshot shows a stopped,
+synthetic configuration preview. Follow the [book-catalog walkthrough](docs/demo.md)
+to run the real baseline and cross-database incremental checks with Compose.
+
 ## Quick start
 
 Install Docker with Compose v2, then run these commands from the repository root:
@@ -117,3 +128,14 @@ consumer watermarks are also checked. Maintenance and replica routing are opt-in
 
 The repository contains no environment backups, production task definitions,
 internal deployment pipelines, or private repository history.
+
+## Feedback and upstream
+
+Use [Studio issues](https://github.com/fooklook/pgsync-studio/issues) for this
+extension's setup, UI, document assembly, and maintenance behavior. Include a
+minimal schema with synthetic data and sanitized logs; see [CONTRIBUTING.md](CONTRIBUTING.md).
+
+PGSync Studio credits [PGSync](https://github.com/toluaina/pgsync) for its engine
+foundation. The Studio-specific runners and operating model are independently
+maintained. Changes proposed upstream are reviewed by the upstream maintainers;
+see [UPSTREAM.md](UPSTREAM.md) for the relationship and compatibility boundaries.
diff --git a/README.zh-CN.md b/README.zh-CN.md
index d3acf5c..f712284 100644
--- a/README.zh-CN.md
+++ b/README.zh-CN.md
@@ -2,6 +2,9 @@
 
 [English](README.md)
 
+[![自动检查](https://github.com/fooklook/pgsync-studio/actions/workflows/ci.yml/badge.svg)](https://github.com/fooklook/pgsync-studio/actions/workflows/ci.yml)
+[![License: MIT](https://img.shields.io/badge/License-MIT-blue.svg)](LICENSE)
+
 PGSync Studio 是基于 [PGSync](https://github.com/toluaina/pgsync) 扩展的
 PostgreSQL → Elasticsearch 同步平台，提供 Web 配置台、跨库文档组装、
 存量与增量同步、故障恢复和运行诊断。
@@ -20,6 +23,13 @@ PostgreSQL → Elasticsearch 同步平台，提供 Web 配置台、跨库文档
 
 Studio 数据源目前支持 PostgreSQL；保留的上游 CLI 与 Studio 的能力边界不同。
 
+## 界面预览
+
+![使用虚构图书配置的任务列表，任务处于停止状态](docs/images/demo-jobs.jpg)
+
+截图展示独立的虚构配置预览，任务处于停止状态。
+实际存量和跨库增量同步的体验步骤见[图书示例演示](docs/demo.md)（英文），也可按下方命令启动 Compose。
+
 ## 本地体验
 
 准备 Docker 和 Compose v2。在本目录执行：
@@ -77,3 +87,13 @@ python tools/check_public_export.py
 
 上述单元测试无需真实数据库；其余上游集成测试需要独立测试服务，
 参见 [贡献指南](CONTRIBUTING.md)。
+
+## 反馈与上游协作
+
+本扩展的安装、界面、文档组装和维护问题，请提交到
+[Studio Issues](https://github.com/fooklook/pgsync-studio/issues)。
+建议附上虚构的最小表结构、数据和脱敏日志，便于复现。
+
+Studio 的引擎基础来自 [PGSync](https://github.com/toluaina/pgsync)，
+Studio 扩展的运行器和运维机制由本项目独立维护。
+上游贡献由上游维护者审核；关系和兼容边界见 [UPSTREAM.md](UPSTREAM.md)。
diff --git a/docs/demo.md b/docs/demo.md
new file mode 100644
index 0000000..db2321c
--- /dev/null
+++ b/docs/demo.md
@@ -0,0 +1,101 @@
+# Book-catalog walkthrough
+
+This disposable Compose example joins PostgreSQL rows into Elasticsearch
+documents. It uses synthetic books, authors, and view counters; the same example
+runs in the repository's [end-to-end CI](https://github.com/fooklook/pgsync-studio/actions/workflows/ci.yml).
+
+## What it demonstrates
+
+The `book-catalog-demo` job reads `books` and `authors` from `catalog`, and
+`book_metrics` from the separate `analytics` database. Both databases live in the
+demo PostgreSQL container. The Elasticsearch index is `book_catalog_v1`.
+
+```mermaid
+flowchart LR
+    Books["catalog.public.books"] --> Document["book_catalog_v1 document"]
+    Authors["catalog.public.authors"] -->|"books.author_id = authors.id"| Document
+    Metrics["analytics.public.book_metrics"] -->|"books.id = book_metrics.book_id"| Document
+```
+
+The job first builds a baseline, then uses native change listeners and durable
+outbox events to rebuild affected root documents. The automatic check changes a
+counter in the second database and a title in the root table, then waits for the
+corresponding Elasticsearch values and checks that runner/listener threads are alive.
+
+## Start the example
+
+From the repository root, with Docker and Compose v2 installed:
+
+```sh
+cp .env.example .env
+# Set DEMO_POSTGRES_PASSWORD in .env before the first start.
+docker compose up --build -d --wait
+docker compose exec studio python examples/studio/bootstrap_demo.py
+```
+
+In PowerShell, replace the first command with `Copy-Item .env.example .env`.
+Open <http://127.0.0.1:8180> and select **任务列表** (task list).
+Use **加载** (load) to inspect a job's tables and relationships. The current UI
+is in Simplified Chinese; the source and setup documentation are available in English.
+
+![Task configuration using the synthetic book-catalog schema](images/demo-config.jpg)
+
+This screenshot was captured from a local configuration preview using the
+checked-in demo schema. Its task is stopped and it does not show live
+synchronization results or performance measurements.
+
+## Verify synchronization
+
+Run the same check used by CI:
+
+```sh
+docker compose exec studio python tools/smoke_demo.py
+```
+
+Expected checkpoints:
+
+```text
+PASS baseline assembly
+PASS cross-database metric update
+PASS root-table update
+PASS actual runner and listener threads
+```
+
+The script updates only the synthetic Compose example. It increments the first
+book's view counter and changes its title, so these values can differ on later runs.
+It rejects jobs whose sources do not match the example's container and databases.
+
+For a manual update:
+
+```sh
+docker compose exec postgres psql -U studio -d analytics -c "UPDATE book_metrics SET views = views + 1, updated_at = now() WHERE book_id = 1;"
+```
+
+In **ES 自定义查询** (custom ES query), select `book_catalog_v1` and submit:
+
+```json
+{"query": {"ids": {"values": ["1"]}}, "size": 1}
+```
+
+The returned document should contain the changed `book_metrics.views` value.
+Synchronization is eventually consistent; this example is a functional check,
+not a latency or throughput benchmark.
+
+## Stop and explore further
+
+```sh
+docker compose down
+```
+
+Named volumes preserve this example's data and configuration. The SQL initializer
+runs only on the first creation of the PostgreSQL data volume. Changing `.env`
+later does not change an existing PostgreSQL role's password.
+
+Replica reads, cleanup, and partition maintenance are disabled in this example.
+They require an appropriate topology and deliberate configuration; see
+[deployment and configuration](deployment.md). Protect administrative access
+before using a shared environment; see [SECURITY.md](../SECURITY.md).
+
+For Studio feedback, use [the project's issue tracker](https://github.com/fooklook/pgsync-studio/issues)
+with a minimal synthetic reproduction. See [UPSTREAM.md](../UPSTREAM.md) for how
+this independent extension relates to PGSync.
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