Edeo & Legoo Mandarin Publications

David Yao is an EdTech innovator, educational content creator, and publisher specializing in multilingual literacy systems and universal language‑learning frameworks. He created the EDEO Thematic Universal Language Learning Framework and the Micro‑Step Reading & Listening System, developed and self‑tested across 10+ languages.

Founder of Legoo Mandarin and Edeo (Educational Video Courses Online), he has built 200+ structured Mandarin courses and Micro‑Step textbooks covering HSK, IGCSE, IB, AP, and SAT Chinese, now expanding to other languages.

Based in Kuala Lumpur with a Master’s in IT from the University of Malaya, David brings 30+ years of teaching experience. He is also the founder of the Tai Chi Fitness Organization, promoting Tai Chi for health, balance, and lifelong wellness.