diff --git a/backend/.env.example b/backend/.env.example
index 4ea5da1..36713ee 100644
--- a/backend/.env.example
+++ b/backend/.env.example
@@ -39,6 +39,7 @@ WECOM_ENCODING_AES_KEY=your-encoding-aes-key
 
 # ── AI / LLM (OpenAI 兼容接口，用于周报摘要) ──
 # 支持 OpenAI / DeepSeek / 通义千问 / 本地 Ollama 等
+# DeepSeek: AI_API_URL=https://api.deepseek.com/v1/chat/completions  AI_MODEL=deepseek-v4-flash
 AI_API_URL=https://api.openai.com/v1/chat/completions
 AI_API_KEY=sk-your-api-key
 AI_MODEL=gpt-4o