In 2001, Mr. Wu Yamin cooperated with the well-logging branch of the former Xi’an Oil Exploration Factory by chance and the manager-Mr. Shan Xiping gave Mr. Wu a lot of encouragement.

In 2001, Mr. Wu Yamin cooperated with the well-logging branch of the former Xi’an Oil Exploration Factory by chance and the manager-Mr. Shan Xiping gave Mr. Wu a lot of encouragement.