As shown in Figure (a), the scattered fitting errors for the correction and entire dataset in the PESH are small in the entire energy range. with the direct electronic structure calculations, i.e., UM05-2X/6-311+G(3df, 2p) and UCCSD(T)-F12a/AVTZ. Besides, the energy differences along the MEPs are included in the figure. One can see that the correction PES ΔVHL-LL is in line with the energy deviations, F12a-DFT. Both shows that the energy range of the correction PES is small, confirming that the selected DFT method (UM05-2X/6-311+G(3df, 2p)) is suitable.