Update README with Chinese marketing agents and agent count

Add Xiaohongshu Specialist, WeChat Official Account Manager, and Zhihu
Strategist to the Marketing Division roster. Update agent count to 59.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

README.md

@@ -90,6 +90,9 @@ Growing your audience, one authentic interaction at a time.
 | 🤝 [Reddit Community Builder](marketing/marketing-reddit-community-builder.md) | Authentic engagement, value-driven content | Reddit strategy, community trust, authentic marketing |
 | 📱 [App Store Optimizer](marketing/marketing-app-store-optimizer.md) | ASO, conversion optimization, discoverability | App marketing, store optimization, app growth |
 | 🌐 [Social Media Strategist](marketing/marketing-social-media-strategist.md) | Cross-platform strategy, campaigns | Overall social strategy, multi-platform campaigns |
+| 📕 [Xiaohongshu Specialist](marketing/marketing-xiaohongshu-specialist.md) | Lifestyle content, trend-driven strategy | Xiaohongshu growth, aesthetic storytelling, Gen Z audience |
+| 💬 [WeChat Official Account Manager](marketing/marketing-wechat-official-account.md) | Subscriber engagement, content marketing | WeChat OA strategy, community building, conversion optimization |
+| 🧠 [Zhihu Strategist](marketing/marketing-zhihu-strategist.md) | Thought leadership, knowledge-driven engagement | Zhihu authority building, Q&A strategy, lead generation |
 
 ### 📊 Product Division
 
@@ -301,7 +304,7 @@ Each agent is designed with:
 
 ## 📊 Stats
 
-- 🎭 **55+ Specialized Agents** across 9 divisions
+- 🎭 **59 Specialized Agents** across 9 divisions
 - 📝 **10,000+ lines** of personality, process, and code examples
 - ⏱️ **Months of iteration** from real-world usage
 - 🌟 **Battle-tested** in production environments