For Bazi analysis and sometimes flying star feng shui, hidden heavenly stems contained in earthly branches can give you deeper insight into a reading.
Here are the hidden elements found in earthly branches.
What they represent can be seen here.
|Earthly Branch||Hidden Heavenly Stems|
|E2||H6, H8, H10|
|E3||H1, H3, H5|
|E5||H2, H5, H10|
|E6||H3, H5 H7|
|E8||H2, H4, H6|
|E9||H5, H7, H9|
|E11||H4, H5, H8|