self-development       
noun [ U ] uk/ˌself.dɪˈvel.əp.mənt/ us/ˌself.dɪˈvel.əp.mənt/
 自我发展
the process in which a person grows or changes and becomes more advanced through their own efforts 
  The graduates stressed the value of their courses for self-development.  毕业生们强调他们的课程对自我发展有价值。 
 You may be fortunate enough to work in a company where you are encouraged to seek self-development.
 - More examples
- Some years ago, an instructor in a self-development workshop asked him to list three things he still wanted to do.
- Self-development experts can teach us how to realize our potential.
- Since the time of Confucius, self-development has always been valued more highly than competitiveness.