diff --git a/.env b/.env
index d8f1a44..44f3eb2 100644
--- a/.env
+++ b/.env
@@ -1,5 +1,5 @@
-# Qihu-AIFlow 环境配置
-# 注：MYSQL_HOST/REDIS_HOST 由 Docker 环境变量传入，本地默认 localhost
+# Qihu-AIFlow Environment Configuration
+# Docker Compose uses environment variables directly, local dev uses .env
 
 MYSQL_PORT=3306
 MYSQL_USER=root
@@ -10,8 +10,13 @@ REDIS_PORT=6379
 REDIS_PASSWORD=pwd2026
 
 SECRET_KEY=aiflow-secret-key-change-in-production-2026
-APP_ACCESS_URL=https://bot.qihuyun.com
+APP_ACCESS_URL=http://210.16.161.218:12888
 DEBUG=false
 
-# 知识库文件存储目录
+# Knowledge file storage directory
 KNOWLEDGE_STORAGE_DIR=/data/share/project/data/knowledge
+
+# SiliconFlow API (default LLM provider)
+SILICONFLOW_API_KEY=sk-idsplzeccvmbtyqxcrbhaiwmkzwajmicliunkjkouivepaaz
+SILICONFLOW_BASE_URL=https://api.siliconflow.cn
+DEFAULT_MODEL=deepseek-ai/DeepSeek-V4-Flash
diff --git a/Dockerfile b/Dockerfile
index 84f4856..434222c 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -3,6 +3,8 @@ FROM python:3.11-slim
 WORKDIR /app
 
 # 安装系统依赖（含编译bcrypt/cryptography所需的build-essential）
+# Use Tsinghua mirror for faster downloads in China
+RUN sed -i 's|deb.debian.org|mirrors.tuna.tsinghua.edu.cn|g' /etc/apt/sources.list.d/debian.sources 2>/dev/null || true
 RUN apt-get update && apt-get install -y --no-install-recommends \
     curl \
     ca-certificates \
@@ -24,6 +26,8 @@ COPY frontend/package-lock.json /app/frontend/package-lock.json
 RUN pip install --no-cache-dir -r /app/backend/python/requirements.txt -i https://pypi.tuna.tsinghua.edu.cn/simple
 
 # 安装Node.js (用于前端构建) 并构建前端
+# Use Tsinghua mirror for faster downloads in China
+RUN sed -i 's|deb.debian.org|mirrors.tuna.tsinghua.edu.cn|g' /etc/apt/sources.list.d/debian.sources 2>/dev/null || true
 RUN apt-get update && apt-get install -y --no-install-recommends \
     nodejs \
     npm \
diff --git a/docker-compose.yml b/docker-compose.yml
index 3047770..3d8b83f 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -27,8 +27,20 @@ services:
       - REDIS_PORT=6379
       - REDIS_PASSWORD=pwd2026
       - SECRET_KEY=aiflow-secret-key-change-in-production-2026
-      - APP_ACCESS_URL=https://bot.qihuyun.com
+      - APP_ACCESS_URL=http://210.16.161.218:12888
       - DEBUG=false
+      - SILICONFLOW_API_KEY=sk-idsplzeccvmbtyqxcrbhaiwmkzwajmicliunkjkouivepaaz
+      - SILICONFLOW_BASE_URL=https://api.siliconflow.cn
+      - DEFAULT_MODEL=deepseek-ai/DeepSeek-V4-Flash
+      - SILICONFLOW_API_KEY=sk-idsplzeccvmbtyqxcrbhaiwmkzwajmicliunkjkouivepaaz
+      - SILICONFLOW_BASE_URL=https://api.siliconflow.cn
+      - DEFAULT_MODEL=deepseek-ai/DeepSeek-V4-Flash
+      - SILICONFLOW_API_KEY=sk-idsplzeccvmbtyqxcrbhaiwmkzwajmicliunkjkouivepaaz
+      - SILICONFLOW_BASE_URL=https://api.siliconflow.cn
+      - DEFAULT_MODEL=deepseek-ai/DeepSeek-V4-Flash
+      - SILICONFLOW_API_KEY=sk-idsplzeccvmbtyqxcrbhaiwmkzwajmicliunkjkouivepaaz
+      - SILICONFLOW_BASE_URL=https://api.siliconflow.cn
+      - DEFAULT_MODEL=deepseek-ai/DeepSeek-V4-Flash
     depends_on:
       mysql:
         condition: service_healthy
diff --git a/migrations/002_init_data.sql b/migrations/002_init_data.sql
index af7de5e..51fb7d8 100644
--- a/migrations/002_init_data.sql
+++ b/migrations/002_init_data.sql
@@ -53,7 +53,8 @@ INSERT IGNORE INTO risk_rules (id, name, type, threshold, duration, is_enabled)
 INSERT IGNORE INTO model_providers (id, name, protocol, api_key, api_base_url) VALUES
 ('prov-001', 'DeepSeek', 'openai_compatible', '', 'https://api.deepseek.com'),
 ('prov-002', 'OpenAI', 'openai_compatible', '', 'https://api.openai.com'),
-('prov-003', '通义千问', 'openai_compatible', '', 'https://dashscope.aliyuncs.com');
+('prov-003', '通义千问', 'openai_compatible', '', 'https://dashscope.aliyuncs.com'),
+('prov-004', 'SiliconFlow', 'openai_compatible', 'sk-idsplzeccvmbtyqxcrbhaiwmkzwajmicliunkjkouivepaaz', 'https://api.siliconflow.cn');
 
 -- ============================================================
 -- 初始化模型
@@ -63,7 +64,8 @@ INSERT IGNORE INTO models (id, provider_id, name, api_key, endpoint, capabilitie
 ('model-002', 'prov-002', 'GPT-4o', '', 'https://api.openai.com/v1/chat/completions', '["text", "vision", "tool"]', 60, 'paid', 10.0000, 1, 0, 0),
 ('model-003', 'prov-003', 'Qwen-Max', '', 'https://dashscope.aliyuncs.com/compatible-mode/v1', '["text", "tool"]', 60, 'free', 0.0000, 1, 0, 0),
 ('model-004', 'prov-001', 'DeepSeek-R1', '', 'https://api.deepseek.com/v1/chat/completions', '["text", "thinking"]', 120, 'paid', 4.0000, 1, 0, 0),
-('model-005', 'prov-003', 'Qwen-Plus', '', 'https://dashscope.aliyuncs.com/compatible-mode/v1', '["text"]', 60, 'free', 0.0000, 0, 0, 0);
+('model-005', 'prov-003', 'Qwen-Plus', '', 'https://dashscope.aliyuncs.com/compatible-mode/v1', '["text"]', 60, 'free', 0.0000, 0, 0, 0),
+('model-006', 'prov-004', 'DeepSeek-V4-Flash', '', 'https://api.siliconflow.cn/v1/chat/completions', '["text", "thinking", "tool"]', 60, 'free', 0.0000, 1, 0, 0);
 
 -- ============================================================
 -- 初始化会员套餐