进修 (jìn xiū): to undertake advanced studies; to take a refresher course

In order to improve her professional skills, she decided to go to Beijing for a year of advanced studies.

The company sent me abroad for three months of advanced training to learn the latest technology.

During his advanced studies, he not only improved his foreign language skills but also got to know many colleagues in the field.

Dr. Wang is going to Shanghai next month for advanced studies in cardiac surgery, so he will temporarily stop seeing patients.