Hi @FelixZhou ,
You really need to provide some further information as how can you share data between the two sites when there is no network connection between your lab and your data center?
If you have some way to connect the two, and would like to use NFS then you could use NetApp FlexCache, with the primary site being your data center and the remote site being your lab. https://www.netapp.com/data-storage/what-is-flex-cache/
FlexCache was average in the past, but with later code versions (I have tested with ONTAP 9.16.1 code) it has improved vastly. There are some catches, but its all documented in the NetApp documentation https://docs.netapp.com/us-en/ontap/flexcache/