This is a column chart with Custom Labels.
Origin allows you to add labels to your data plot using x, y values or information from other column(s) in the worksheet. It is not necessary to set the column designation as Label, and custom formatting is available to flexibly combine and format information from other column(s) in the worksheet.
When Label Form is set to Custom, an edit box named Format Strings becomes available. Multiple columns and arbitrary fixed strings can be combined as desired. Columns to the left or right of the data column can be referred to, either by index or by the column's short or long name.
View the Hints text in the dialog for examples.
To learn the syntax, please see available notations and explanations in the Substitution Notation page in LabTalk reference.