He is a barefoot doctor.

他是一名赤脚医生。

Mr. Zhang is a "barefoot doctor, " someone trained by the government to administer simple remedies and sent to remote areas that are too small to attract a doctor with a full medical degree.

张长建是一名“赤脚医生”。 赤脚医生一般都接受过政府组织的培训，能够处理简单的病例，通常被派往那些拥有医学专业学位的医生不愿去的偏远小村落。