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Zhengyi Cao

Nov 2, 2019

Four Must-Have Types of Information in a Product Page

A good product page provide 4 types of differentiating information and they serve for 4 purpose: Cognition, Trust, Value and Action.

Zhengyi Cao

Oct 31, 2019

Why iPhone Has Two Ways to Answer a Call?

There are two different screens of an incoming call on iPhone and they are displayed under different situation. Why does Apple design this?

Zhengyi Cao

Sep 16, 2019

Several Principles in Voice-User Interface Design

An overlook of Voice User Interfaces (VUIs) and several principles in the design of VUIs. Use these principles cleverly.