lurr

### Bug summary I trained a dpa2 model using `deepmd-kit-3.0.0a0/examples/water/dpa2/input_torch.json` , training data is `deepmd-kit-3.0.0a0/examples/water/data`, freeze and use `frozen_model.pth` to run DPMD using input files in `deepmd-kit-3.0.0a0/examples/water/lmp`. All above works...

need more specific description of feilds

8

i begin to use dpti and it seems to work but questions below confuse me: 1)There is no _FreeEnergyLiquid.json_, can not open. And i don't find it in dpti pakages....