About periodic boundary conditon in lammps data file

Dear Lammps user

I’m confusing a problem about periodic boundary condition (PBC) in lammps data file when the atom has bonds.
For example, I have this unit solid structure, each atom is connected with 4 bonds:





Now i want to simulate this structure with PBC.

In my data file:


atomid atomtype charge x y z

Bonds section

Sine it’s PBC, in Bonds Section, should I also include a bond between A1-A4, B1-B4, C1-C4, D1-D4, A1-D1, A2-D2, A3-D3, A4-D3 ?