How to rescue my lost APFS partitions My Disk is 500 GB, and APFS Physical Storage and AppleAPFSMedia are 300GB, can't run First Aid on both. 

Currently I can login to macOS High Serria(199GB partition) on which I post this.

There was a system(macOS high serria) and a lot data on that 300GB partition, I can't just erase it, How can I rescue that partition ?

details as below:

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$ diskutil list
/dev/disk0 (internal, physical):
   #:                       TYPE NAME                     SIZE       IDENTIFIER
   0:      GUID_partition_scheme                         *500.3 GB   disk0
   1:                        EFI EFI                      209.7 MB   disk0s1
   2:                 Apple_APFS Container disk2          301.0 GB   disk0s2
   3:                 Apple_APFS Container disk1          199.0 GB   disk0s3

/dev/disk1 (synthesized):
   #:                       TYPE NAME                     SIZE       IDENTIFIER
   0:      APFS Container Scheme -                       +199.0 GB   disk1
                                 Physical Store disk0s3
   1:                APFS Volume High Sierra              51.8 GB    disk1s1
   2:                APFS Volume Preboot                  42.1 MB    disk1s2
   3:                APFS Volume Recovery                 1.0 GB     disk1s3
   4:                APFS Volume VM                       4.3 GB     disk1s4

/dev/disk2 (synthesized):
   #:                       TYPE NAME                     SIZE       IDENTIFIER
   0:      APFS Container Scheme -                       +ERROR      disk2
                                 Physical Store disk0s2


Thanks !
Run Disk Utility from Recovery Mode
On Reboot, press Cmd-R
Open Disk Utility.
Select your partition one by one and hit repair a couple of times.


If you have another Mac, you can mount your MacBook partition using Target Disk Mode. Connect both Macs with Thunderbolt/USB-C cable. Reboot your MacBook, then immediately press and hold T while it starts up. Hopefully your APFS partition will show up. Note: Both Macs should be using APFS volume.