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Harry Chang

About

I'm Harry Chang. I build safety systems for language models, take photographs I don't look at until later, and argue for positions I'm not sure I believe in.

Now a freshman at NTU CSIE. I work across research, photography, debate, and the occasional film, whichever one the day needs, and write about what happens in between.

None of it is as separate as it looks. Every page here connects to another; if you'd rather see the whole shape at once, there's a graph for that.

Roles

Description

LLM Researcher

2023 - Present

Researching LLM safety representations at CyCraft and pretraining at Cerulean Labs, with previous work at TMLR and EACL SRW.

Speaker & Organizer

2024 - Present

Talks on RAG (SITCON 2025) and prompt injection (2026). Taught jailbreaking at AIS3 and ML at SITCON Camp.

Developer

2023 - Present

From LLM eval infrastructure and an NSTC-awarded RAG system to portfolio sites and an enterprise ops modernization.

Debater

2020 - Present

Open Semifinalist at the Taiwan International Debate Open (2026). Champion at the Fushing Debate Open (2025).

Photographer & Editor

2022 - Present

DaVinci Resolve editor with experience ranging from montages and educational videos for AAAI to music videos.

Updates

Awarded NTU's Fu Bell Scholarship, as one of 17 incoming freshmen selected university-wide

2026-10-30

Released my first-author paper CASTOR on arXiv: identically trained language models break on different jailbreaks

2026-10-25

Co-first-authored paper PATCH accepted to ISCSLP 2026

2026-08-21

Returned to Chingshin Academy to give a 20-minute talk on Special Admission and college pathways

2026-08-13

Gave an alumni talk at the AIGO program showcase at AI WAVE SHOW 2026

2026-07-30

Taught a hands-on LLM jailbreak attack & defense lab at AIS3 2026 (slides)

2026-07-23

Taught the ML course at SITCON Camp 2026 (slides)

2026-07-12

Spoke on the geometry of LLM safety heads at CraftCon 2026

2026-07-03

Named one of Taiwan's Ten Outstanding Youth (high school division) by Kiwanis International Taiwan District

2026-06-23

Graduated from Chingshin Academy with the Mayor's Award for Distinguished Performance

2026-06-02

Semifinalist at Taiwan International Debate Open; Grateful for my amazing team: Nicole and Cat Lai.

2026-04-26

Received the 2025 Harvard Quiz Bowl (CS) award in person at Harvard.

2026-04-11

Spoke on AI Prompt Injection defense at SITCON 2026 (R0)

2026-03-28

Presented virtually at EACL 2026 on PATCH

2026-03-26

Co-first-authored paper PATCH accepted to EACL 2026 SRW

2026-02-03

Accepted to NTU CS via Special Admission! Check out my blog for more details

2025-12-24

Turborepo is implemented after a completed architectural overhaul

2025-11-17

Named Global 2nd place and National Individual Champion in the Harvard Quiz Bowl 2025 (CS).

2025-10-20

My first-authored paper, FORTRESS, has been published at TMLR

2025-10-12

My blog post on LLM safety was published at CyCraft Research Lab

2025-10-03

Scored 8.5/9.0 on IELTS Academic after self-studying

2025-09-22

Reduced paper reading page LCP via build-time arXiv API caching

2025-09-16

Introduced a dedicated mobile staggered menu with additional UX improvements

2025-09-10

Wrote photography annotations for every gallery post, check them out!

2025-08-08

Phase 1 project content has been curated, more will be retroactively added soon

2025-08-04

Added full language support for English and Traditional Chinese using i18n!

2025-08-02

Added support for Google Drive and YouTube video links

2025-08-01

Gave a speech for AI WAVE Opening Ceremony at TWTC

2025-07-31

PATCH has been submitted to ACL ARR July cycle after extensive revisions

2025-07-30

FORTRESS has undergone review for TMLR

2025-07-05

Participated in the AIGO program's one-day hackathon at NTU, won first prize

2025-07-04

PATCH won first prize in the school's research competition

2025-06-30

Won championship at Fushing Debate Open 2025 thanks to my amazing team!

2025-06-15

Excited to announce that I have been awarded the Harvard Prize Book!

2025-06-11

Kicked off the FORTRESS project, a RAG-inspired defense system

2025-05-18

PATCH has been submitted to ACL ARR May cycle

2025-05-15

Personal portfolio site launched 🎉

2025-04-01

Projects

See All→
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CASTOR Twin Study

CASTOR Twin Study

Academic Research • LLM Safety

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FORTRESS System

FORTRESS System

Academic Research • LLM Safety

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PATCH Dataset

PATCH Dataset

Academic Research • LLM Safety

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SITCON Camp 2026 ML Course

Teaching • Curriculum & Courseware

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夢華: Graduation Song MV

Video Production • Music Video

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SITCON 2026 Talk

Talks • Conferences

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AAAI 2025 Educational Video

Video Production • LLM Safety

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SITCON 2025 Talk

Talks • Conferences

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Portfolio Website

Web Development • Personal Project

Photo Gallery

See All→
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Intersection

Intersection

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Marginalia

Marginalia

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Interlude

Interlude

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If on a winter's night a traveler...

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Against Giants

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Simple in a Complex World

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Lessons from the Light

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The Version That Stayed

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Go Where You Feel Most Alive

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Tears in Rain

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Guided by the Tides

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Splash of Red

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Find Your Peak...

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Mortal Sparks

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Sky Above

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Dusk Impressions

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Intersection

Intersection

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If on a winter's night a traveler...

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The Version That Stayed

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Guided by the Tides

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Mortal Sparks

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Marginalia

Marginalia

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Against Giants

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Go Where You Feel Most Alive

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Splash of Red

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Sky Above

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Interlude

Interlude

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Simple in a Complex World

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Tears in Rain

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Find Your Peak...

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Dusk Impressions

Blog

See All→

What Did You Almost Not Write Down?

Personal • Memoir

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What Did You Almost Not Write Down?

All C: Of Fake Autobiographies and Borrowed Answers

Memoir • Personal

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All C: Of Fake Autobiographies and Borrowed Answers

The Longest Possible Route: On Walking Into the Rain

Personal • Travel

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The Longest Possible Route: On Walking Into the Rain

Table 2: Of Sundays and Pho

Food • Personal

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Two Floors Down: Chingshin, May 2026

Memoir • Personal

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Go Back to New Jersey: Contradictions, Ghosts, and the Loop That Wouldn't Close

Travel • Memoir

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365 with harrychang.me: On Whims, Rebellion, and Owning a Corner of the Internet

Web Development • Retrospective • Personal

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17 Studs Wide: A LEGO Fan Mount and the Case Against Outgrowing

Hardware • Homelab • DIY

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Leica M11-D: On Privilege, Presence, and Why I Can't Defend This Purchase

Photography • Hardware • Review

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Building highways when lanes feel too narrow.Sometimes it's sharp, sometimes it's f/1.5 blur.

Did something connect? Or break? Leave a note.

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© 2026 Harry Chang