This design targets and aims to solve a simple but tricky problem in life, that is how to tell the freshness of an egg. Customers may open a bad egg without pre-notice which can lead to either food poisoning or contamination of other ingredients. This issue enlightens the design of egg freshness tag which is a paper based chemical indicator reacts with carbon dioxide by the change of color to inform the freshness level. Different colors represent different grades of freshness, green for fresh, yellow for stale and red for bad.

Zeyuan Zhang is a globally recognized user experience and product designer, as well as a scientific researcher, known for delivering user-centric solutions across healthcare, automotive, and fintech. With experience at Siemens Healthineers, BMW, and Citi, his portfolio exemplifies intuitive, high-impact design. Zeyuan has won top honors including the iF, Red Dot, IDA, and Muse Design Awards, and served as a jury member for major global competitions. Featured in Bloomberg and New York Weekly, he contributes to shaping the future of design through innovation, thought leadership, and a commitment to elevating user experience worldwide.

Mechanical, materials and manufacturing engineering (M3) at The University of Nottingham Ningbo China is an exciting, dynamic and fast growing department. Its programmes cover mechanics, dynamics, kinetics, thermodynamics, energy, fluids, materials, manufacture, ergonomics and design. The Department of Mechanical, Materials and Manufacturing Engineering has strong links with the corresponding departments in the UK and Malaysia campuses of the University of Nottingham. Its exceptionally close involvement with Chinese and international institutions and industries ensures a high quality teaching and research in the relevant professional fields.