Hi @yuyang,

If you search around on these forums or look within the Developer Community Portal, you will find many example of how to use the get_data() function. Specifically, the Eikon Data API tutorials place is a good place to start.

In those tutorials, it will discuss some of the ways to figure out which fields and how to construct your calls. Specifically, the DIB (Data Item Browser) within Eikon is a very useful tool. You simply type in the instrument name (in your case the Bond code) and query for the fields, i.e.

For example:

If you can't find the data you are looking for, the best resource for content questions is to go through the Refinitiv Helpdesk.