Product DesignYear 2026
Niello
App Store submission is the last mile most developers dread and most designers ignore. Niello treats it as a design problem. A live canvas renders pixel-perfect device frames acros…
View Case Study
Case Studies
Selected Work
A searchable collection of YiJiaYidesign projects across brand identity, digital product design, and AI interaction experiences.
AI Product DesignYear 2025
Artifact
Developers using AI to write code still face a blank canvas the moment they need an icon, a sprite, or a game asset. Artifact is a multi-agent visual generation platform that handl…
View Case Study
Design ToolYear 2025
ColorBridge
The gap between a color on screen and a color in print has frustrated designers since desktop publishing began. ColorBridge resolves it with the Delta E 2000 perceptual algorithm,…
View Case Study
Product DesignYear 2025
PinPin Cam
PinPin Cam is a collage camera app for iOS, built for people who arrange images rather than just shoot them. Two modes — freeform and grid — share a single interaction model: drag,…
View Case Study
Website DesignYear 2025
Runbow
Twenty years of logistics operations had outgrown the language the company used to describe itself. The redesign rebuilt information architecture around what users need to find, no…
View Case Study
AI Product DesignYear 2024
Index
A large language model without a face is infrastructure. When bilibili finished training Index, the question became how people would live with it. The interface was stripped back s…
View Case Study
Platform DesignYear 2024
AI Open Platform
B2B platforms tend to explain everything and demonstrate nothing. The design for bilibili's AI Open Platform made the opposite bet — capabilities are shown through example, not enu…
View Case Study
Content & MarketingYear 2023
Programming Journey with Apple
YJYD co-founder Kim Ma collaborated with Apple's marketing and content teams to share his story of developing apps with Mac — from the curiosity that led to a first line of code, t…
View Case Study
Course & PresentationYear 2023
Co-create Today at Apple
YJYD co-founder Kim Ma was invited by Apple to co-create and deliver a Today at Apple session on app design — live, online, open to the public. The work covered both form and subst…
View Case Study
App DesignYear 2023
Xunji
Xunji is an app for calligraphy and painting restoration — a domain where professional knowledge has traditionally stayed within workshops and conservation labs. The professional v…
View Case Study
Interactive ExperienceYear 2023
AI-Origin
AI-Origin is an interactive experience built around a Macintosh learning to recognize handwritten digits — a narrative that runs parallel to the actual history of neural network de…
View Case Study
System DesignYear 2023
Digital Twin Campus
YJYD independently implemented panoramic modeling for an entire university campus — drone imagery totaling hundreds of gigabytes, stitched and structured into a navigable spatial l…
View Case Study