18 · Grade 12 · Co-founder & CTO
From first playing Overwatch in fourth grade to an irreversible path into computer programming.
PolyU campus · LN9267 / Wikimedia · CC BY-SA 4.0
MIT Hayden Library exterior · Daderot / Wikimedia · Public Domain
My name is Faxin Xu. I'm from Xining, currently a Grade 12 student. I love computer science and enjoy building interesting projects. I'm also a tech creator who teaches programming on Bilibili and shares what I learn. You can find my channel "Linus Shyu" on Bilibili or YouTube—including my Solidity and Ethers.js tutorial series.
Beyond code, I enjoy cycling and skateboarding outdoors, capturing life through the lens, or relaxing at the piano. As an informatics competitor, I was selected for NOI 2025 Winter Camp, the 2024 National Olympiad in Informatics in Provinces, and AdventureX 2025 and 2026. These experiences deepened my interest in software development and theoretical computer science, and strengthened my goal to pursue a PhD in CS at MIT. I hope to build tools and apps that work for me and help others with similar journeys.
Right now I'm developing and shipping an app called FeelFlow on the App Store with Swift. I'm also learning front-end to build beautiful, interactive pages. To broaden my technical horizons, I'm getting started with Rust—recreating the NeoFetch open-source project and exploring Linux internals. I keep publishing Solidity and Ethers.js tutorials on Bilibili, and I'm rethinking what I could build with Solidity that truly resonates, beyond crypto alone.
Track 2nd · Open source
A native macOS workspace around the MacBook notch.
Swift · macOS. Music, local agent, voice, reminders, system controls, and desktop pets in one notch UI. Now open source.
Shipped on the App Store
Privacy-first emotional journal. Live on the App Store.
SwiftUI · iOS 18. On-device only. Multiple AI personalities for unscripted empathy—built for people who journal and care about privacy.
View on App Store >
12 GitHub ★ · Software copyright
Next-gen terminal workflow for OI / ACM athletes.
Python. Contest sites, local files, local/online LLMs, and rating charts in one terminal stream. Software copyright registered.
MoonShot48 Third Prize
Learning diagnostics focused on error causes—not piles of wrong answers.
OCR, AI parsing, mind maps, and targeted drills. Students get causes; teachers get cohort insight.
View CauseLink >Outside the core line, these still shape how I build.
I teach programming on Bilibili and share hackathon runs and shipping notes—including Solidity and Ethers.js series.
Away from the keyboard, I stay outside or make things with my hands.
