To further clearly evaluate the models' ability to generate integral fragments assembled OOMs, we define two new metrics: the connected ratio, which is the proportion of valid molecules where all fragments are connected to each other; and the Avg. Rings / Mol, which is the average number of rings in each valid molecule. On the FORMED dataset, 86.11% of the molecules generated by O 2 -GEN are intact, while this ratio for other baseline models ranges from 39% to 51.9%. On the AOMAD datasets, due to the increase in molecular size and the number of rings, the connection ratio of molecules generated by the three baseline models is close to 0, while O 2 -GEN still remains above 30%. The average number of rings in the obtained molecules is 14.78, which is also much higher than that of the baseline models. The introduction of pre-training 3D information enables our generator to more effectively construct connected fragments assembled OOMs.