[_binder]

Right, So I am doing a research project and If I want to use this library in that project, does that mean I have to pay to use it. My project is currently closed source , because don't want anyone to steal stuff before I publish my paper. After that the code goes public.

[iainmerrick]

Linking with the code of this software in any form is not considered as containing its code

As long as you don't make any changes, sounds like it's free and unrestricted.

[fiatjaf]

No, you don't have to pay. You only have to pay if you modify Yue.

[rkeene2]

If you modify "Yue", want to redistribute the modified "Yue", AND don't want to release your modifications to "Yue" in source form.