Does the value of ‘sel’ must be proportional to the number of atoms？

[phyoung123]

There is a file, out.json, auto-generated by the program transformed from the input file when the program onset to tain the model, I set 'sel' to 'auto' in the input file, but it is assigned a value of 40 40 108, while the atomic ratio is 1:1:3. Does its value have to be proportional to the number of atoms?

[AnguseZhang]

No, it's not a must to set sel proportional to the number of atoms.
See https://docs.deepmodeling.com/projects/deepmd/en/master/troubleshooting/howtoset_sel.html?highlight=sel

[phyoung123]

Thanks