阅读下面短文，按要求完成相关任务。
Ma Hua graduated from Fudan University. He had a good career in IT and a great life in Shanghai, but he felt there was something missing from his life. He wanted to help others to improve their lives, so in March 2003 he gave up his job. Then he moved to south-west China to do voluntary work in a village primary school.
He soon became an important member of the local people. In his class, he painted pictures on the walls to help students remember English words. He also spent his money building a playground for the children.
Ma Hua quickly got used to his new life. He got great satisfaction from his work and felt very happy, even though life there was hard---he had to melt(融化) ice for water and grow vegetables for food. When he was free, he wrote poems describing the peace and beauty around him. Sometimes he would go walking in the mountains and enjoy the beautiful view.
Sadly Ma Hua was killed in a car accident in July 2004 at the age of 31. His death was a great loss to all those who knew him, but it is a comfort to know that he lived happily, doing what he loved and enriching the lives of others.
When did Ma Hua give up his job in Shanghai?                             
What did Ma Hua build for the primary school children?                  
Did Ma Hua enjoy his life in the village?                               
What did Ma Hua do in his free time? Give ONE example.                
What can we learn from Ma Hua?