For the octamer tests, we obtain an RMSD of 0.113±0.006, 0.061±0.002, 0.042±0.001, 0.034±0.001, C dispersion terms). The big difference between the training and the testing errors of model 6 clearly show that such strategy, although being the widely used nowadays, does not warrant a good transferability with a small cutoff of 4Å.