Hello,
First, thank to all people who spent time to read my questions, I am very grateful for that.
Here is my question, I wanted to connect two simulation boxes( or called cell boxes) into one simulation box, but two of them have a different lattice parameters, model A belonged to orthorhombic system and B model belonged to monoclinic system with ẞ=117 degree.
I have already try the "build layer" in build menu, but i cann't maintain the model property, like density.

finC file is the similar image of the final model I would like to construct.
please, help me, or give me any advice. Thanks.

Best regard,
MHW