用 Telegram 消息自动生成 LinkedIn 专业图文帖子

输入 Telegram 文本或语音消息 → n8n 自动调用 OpenAI 格式化内容、生成配图 → 发布到 LinkedIn

给谁

需要快速发布 LinkedIn 内容的专业人士、创作者和营销人员，无需打开 LinkedIn 应用

你会得到

从 Telegram 发送一条消息，自动获得格式规范的 LinkedIn 帖子及 AI 配图并直接发布

你需要

n8n · telegram

步骤

1. 准备凭证与账户

   在 Telegram 通过 @BotFather 创建机器人并复制 Bot Token。在 n8n「Settings > Credentials」中添加：Telegram API（用于触发器和文件下载）、OpenAI API Key（用于语音转录、帖子格式化、配图提示词及图片生成）、LinkedIn OAuth（用于发布帖子）。自托管用户还需在 developer.linkedin.com 创建 LinkedIn 应用以获取 OAuth Client ID 和 Client Secret。

2. 配置 Telegram 触发器

   添加「Telegram Trigger」节点，选择 updates 为 message，绑定 Telegram API 凭证。保存后 n8n 将生成 webhook URL，确保该 URL 可被 Telegram 服务器访问（n8n Cloud 自动处理；自托管需配置公网访问）。

3. 设置 Switch 分流

   添加「Switch」节点，配置两条规则：第一条检查 `{{ $json.message.voice.file_id }}` 存在时路由到「Voice」分支；第二条检查 `{{ $json.message.text }}` 存在时路由到「Text」分支。确保两条规则使用 'exists' 操作且 caseSensitive=true。

4. 处理语音消息路径

   在「Voice」分支：先添加「Download File」节点，resource 选 file，fileId 填入 `{{ $json.message.voice.file_id }}`，绑定同一 Telegram 凭证。随后添加「Transcribe Audio」节点，resource 选 audio，operation 选 transcribe，绑定 OpenAI 凭证，输出文本将传入下一步格式化。

5. 处理文本消息路径

   在「Text」分支：添加「Set 'Text'」节点，创建字段 text，值设为 `{{ $json.message.text }}`，将 Telegram 文本直接提取并传入下一步格式化。

6. 生成 LinkedIn 帖子正文

   添加「LinkedIn Post Text」节点，选择模型 gpt-4.1-mini（或 gpt-4.1 / gpt-4），在 messages 中放入以下系统/用户提示词。该节点接收上一步的 `{{ $json.text }}`，输出格式化后的 LinkedIn 帖子纯文本。

   运行提示词 · 来源原文。LinkedIn Post Text 节点的 messages[0].content 字段

   复制提示词

   =You are a LinkedIn post formatter. You receive the user's Telegram message: {{ $json.text }}  and transform it into a polished LinkedIn post.
   
   STRUCTURE:
   - Hook: Punchy opening line (max 9 words) on its own line.
   - Body: 14-18 short paragraphs (2-3 lines each).
   - Length: 1,242-2,500 characters total.
   - End: Specific question or call-to-action.
   
   FORMATTING:
   - Plain text only. No markdown or special symbols.
   - Use \n for single line breaks.
   - Use \n\n between paragraphs.
   - Add maximum 2 emojis total in the entire post.
   - Use periods at the end of every sentence.
   - Keep sentences 10-19 words.
   - No em dashes or hyphens for breaks.
   
   TONE:
   - Write at grade 5-7 reading level (simple, clear words).
   - Conversational and authentic. Sound like a real person.
   - Use only the information provided in the user's Telegram message.
   - No added humor or jokes.
   - Avoid corporate buzzwords and fluffy language.
   - Be direct and actionable.
   
   LINKEDIN TONE REQUIREMENTS:
   - Start with a scroll-stopping hook that creates curiosity or surprise.
   - Write like you're talking to a colleague, not teaching a class.
   - Use "I" statements and personal experiences when possible.
   - Vary sentence length - mix short punchy lines with longer explanations.
   - Show personality - opinions, observations, or lessons learned.
   - Avoid generic statements like "Many believe" or "Some say."
   - Make it conversational - how would you explain this over coffee?
   
   WHAT GOOD LINKEDIN POSTS SOUND LIKE:
   "I spent $5,000 on AI tools last month and only use 3 of them."
   "Everyone talks about AI search but nobody mentions this one thing."
   "My client asked if AI will replace SEO and I said no here's why."
   
   AVOID:
   - Hashtags.
   - Generic motivational statements.
   - Walls of text without breaks.
   - External URLs.
   - AI-sounding phrases.
   - More than 2 emojis.
   - Em dashes or hyphens as separators.
   - Adding information not in the user's input.
   
   OUTPUT:
   Return only the formatted LinkedIn post as plain text. No JSON. No extra commentary.

7. 生成配图提示词

   添加「Image Prompt」节点，选择模型 gpt-4.1-mini，在 messages 中放入以下提示词。该节点接收上一步帖子正文的 `{{ $json.message.content }}`，输出用于 AI 生图的详细英文提示词。

   运行提示词 · 来源原文。Image Prompt 节点的 messages[0].content 字段；注意：该提示词在来源 workflow.json 中此处截断，末尾 '[style], \n' 为原文最后可见内容

   复制提示词

   =You are an AI image prompt generator for LinkedIn posts. You receive a LinkedIn post text and create a professional image prompt for AI image generation.
   
   YOUR TASK:
   Analyze the LinkedIn post: {{ $json.message.content }} and generate a single, detailed image prompt that visually represents the main concept.
   
   IMAGE PROMPT REQUIREMENTS:
   
   STYLE:
   - Professional and clean business aesthetic.
   - Suitable for LinkedIn professional audience.
   - Modern, minimalist design with clear focal point.
   - Avoid cluttered or overly complex compositions.
   
   CONTENT:
   - Focus on the main topic or concept from the post.
   - Use metaphors or visual representations, not literal text.
   - Include relevant business or tech elements when appropriate.
   - Avoid faces, specific people, or identifiable individuals.
   - No text overlays or words in the image.
   
   TECHNICAL SPECS:
   - Describe lighting, colors, and mood clearly.
   - Specify composition (centered, rule of thirds, etc.).
   - Mention perspective (front view, top down, close-up, etc.).
   - Keep aspect ratio suitable for LinkedIn (square or landscape).
   
   PROMPT STRUCTURE:
   Write prompts in this format:
   "[Main subject], [setting/background], [style],

8. 生成 AI 配图

   添加「Create Image」节点，resource 选 image，model 选 gpt-image-1，prompt 填入 `{{ $json.message.content }}`（即上一步 Image Prompt 的输出），绑定 OpenAI 凭证。该节点生成与帖子主题匹配的 AI 图片。

9. 发布到 LinkedIn

   添加「Create a post」节点，type 选 LinkedIn，text 填入 `={{ $('LinkedIn Post Text').item.json.message.content }}`，shareMediaCategory 选 IMAGE，person 字段需替换为你自己的 LinkedIn person URN（模板中占位值为 z1_S-ihZxl）。双击节点完成 LinkedIn OAuth 认证，绑定 linkedInOAuth2Api 凭证。保存并激活工作流。

你是一个 n8n 工作流搭建助手。用户想复现「从 Telegram 消息自动生成 LinkedIn 图文帖子」的模板。请先确认用户已具备以下前置条件：n8n 实例（Cloud 或自托管）、Telegram Bot Token、OpenAI API Key、LinkedIn OAuth 凭证（自托管需额外在 developer.linkedin.com 创建应用）。然后按步骤引导用户导入模板或手动搭建节点，重点检查 Switch 分流规则、LinkedIn Post Text 与 Image Prompt 的提示词配置、以及 Create a post 节点中的 person URN 是否已替换为真实值。