Grandpa from Arizona

He used to teach engineers. Now he devotes his time to improving the English of young people eager to improve their chances of finding a job. He tells Li Yang how he began his journey to Yangshuo.

August Dietz had a very clear vision in 2005. He says it was as if he saw a plane flying in the skies before him, and it was carrying a long red banner that said: "Go to China".

The 83-year-old retired engineering teacher from Arizona, United States, obeyed the call, and he has been teaching English in Yangshuo as a volunteer for the last seven years.