Are you asking if Ouyang Haowen is Lang Lang's apprentice? Ouyang Haowen is not Lang Lang's apprentice. Ouyang Haowen is a famous music educator and pianist in China, focusing on the research and promotion in the field of music education. There are many students who have cooperated with him or been influenced by him, but there is no public report that Lang Lang is his master. Lang Lang is a world-renowned pianist in China. He is famous for his superb piano playing skills and excellent musical expression. As a teenager, he showed extraordinary musical talent, and was guided and trained by many outstanding musicians, such as Gary graffman and Tu Honggang.