After Three Months of Running an X Account, I Studied the Recommendation Algorithm Again

I have been seriously running an X account for about three months. Throughout those three months, I kept coming back to one question: Why do some accounts with relatively few followers get extremely high impressions on a single post, while accounts with many followers struggle to get their content recommended? At first, like many people, I focused on the visible numbers: likes, reposts, and follower count. But recently, after studying X’s public recommendation algorithm again and observing two completely different accounts, I realized that things may not be so simple. ...

September 10, 2026 · 10 min · Sanfeng

Why I Built IndexFlow-core: From a Google Indexing Crisis to Open-Source Infrastructure

This project did not start with the idea that I wanted to build an SEO tool. It started with a real website incident and a question that kept bothering me afterward: How do I know whether a URL has actually been understood, crawled, and indexed correctly by a search engine? A Website That Seemed to Be Doing Well In mid-to-late June, I launched an AI-built resource website. It had a large number of URLs and multiple language versions, so I knew from the beginning that search traffic would be important. ...

September 10, 2026 · 6 min · Sanfeng