THE SHORT VERSION
I build at the intersection of software, learning, and navigation.
I started in software engineering, moved into computer science, and found my current direction in trustworthy positioning systems.
HONG KONG, CHINA · UTC+8
I’m Liang.
Curious by default.
Building with purpose.
I’m a PhD student and software researcher working across learning, optimization, and navigation—with a habit of asking “but why?”
RIGHT NOWPhD @ PolyU
MY ROUTEXi’an → Hong Kong, China
01 · ABOUT ME
A bit about
A bit about
me.
I’ve taken a pleasantly indirect route from writing software to thinking about how machines understand where they are.
WHERE I AM
Hong Kong, China
Usually somewhere between a terminal, a whiteboard, and the next interesting question.
CURRENT QUESTION
Can a navigation system know when it might be wrong?
FIND ME AROUND THE INTERNET
02 · THE PLOT SO FAR
Three chapters.
Three chapters.
Still unfolding.
-
01
2018—2022
Software Engineering
Shaanxi Normal University
Xi’an, China · where the story started -
02
2022—2024
Computer Science
City University of Hong Kong
Hong Kong, China · a master’s and a new direction -
03
2025—NOW
Positioning & Navigation
The Hong Kong Polytechnic University
Hong Kong, China · PhD @ IPNL
03 · RESEARCH
My current
My current
research.
How do we build positioning systems that are accurate, explainable, and honest when the city makes satellite signals misbehave?
urban GNSSdeep learningcredible uncertaintydifferentiable optimizationtrustworthy navigation
CredibleDFGO: Differentiable Factor Graph Optimization with Credibility Supervision
Liang Qian, Penggao Yan, Penghui Xu, and Li-Ta Hsu
Read the paper ↗LET’S CONNECT