Sure, I can help you with that! However, "com.91" is not a very specific topic. Could you please tell me more about what you'd like the article to be about? For example, are you interested in:

A specific company or organization with "91" in its name (like 91.com, if that's what you mean)?
A particular aspect of the internet or technology that uses "91" in some way?
A concept or idea where "91" plays a role?

Once I have a clearer understanding of your topic, I can create a detailed outline and a comprehensive, SEO-optimized article in Chinese for you. I'm looking forward to hearing more!