In summary, despite being trained on C-H cluster systems, the ANN potential demonstrates applicability to periodic C-H systems, successfully identifying the energy ordering and capturing correct morphologies, except for layered structures. For pure C molecular crystals (group I and II), the potential can give the right energy ordering for the stability of the configurations based on E f analysis. However, for the other systems, especially for the layered ones and the low-symmetry C systems with space group P 1, the accuracy of the potential needs to be improved.