# Jian Chang

> Jian Chang is a startup investor. See 0 investments, check sizes, portfolio and contact details. Updated Sep 2026.

- Type: Angel Investor
- Last updated: Sep 2026

Jian Chang is a startup investor. Dr. Yu is the CTO of AsiaInfo Data, which provides big data and AI solutions to all three telecom carriers in China. Its distributed big data platform processes over 7PB of data daily. Before joining AsiaInfo, Dr. Yu served as VP Engineering and Chief Architect for Mafengwo, the largest online travel community in China, with over 100 mobile andonline users. Previously, he was VP Engineering and Chief Architect at OpenX, responsible for the company's data strategy, mobile product line, and overall architecture, consisting of more than 6000 servers and 15PB of data distributed in 5 global data centers. Dr. Yu is also a serial entrepreneur, co-founded two startups, Portaura in social mobile big data and Martsoft in e-commerce search engine.Early in his career, he spent a number of years in HP(DEC) Systems Research Center, one of the top research labs in the world, where he worked closely with numerous Turing Award recipients in browser technology, search engine, multimedia, and distributed file systems. Dr. Yu holds PhD in Computer Science and Engineering from UNSW and BS in Computer Sciences and BA in Mathematics from UT Austin. He has published papers and gave keynote speeches in numerous major international conferences.

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