ZHANG Dousan was a Guangdong farmer who had little or no knowledge about aviation when he began his mission to build a light aircraft. However, he immersed himself in books on the subject, and slowly...
Please login first!
ZHANG Dousan was a Guangdong farmer who had little or no knowledge about aviation when he began his mission to build a light aircraft. However, he immersed himself in books on the subject, and slowly...