If you are going to transfer ownership of your workgroup/group chat, you can try the following method:
I. Transfer Ownership to Internal Member
i. Member's List
1. In Lark messenger, open the workgroup you owned/manage.
Click on the "Member List" icon and the members list will show.
Locate the person you want to transfer the workgroup then click the "Set as Owner" icon.
You will be prompted to "Confirm" the ownership transfer of the doc.
If Confirm button was clicked, the workgroup will be successfully transferred to the new owner.
ii. Settings
1. In the workgroup, click the ellipses icon and select "Settings"
2. Inside the settings, select "Group Settings"
3. Inside the group settings go to "Assign new group owner"
4. Select the person you are going to transfer the workgroup to and click the "Confirm" button.
If Confirm button was clicked, the workgroup will be successfully transferred to the new owner.
Note: Workgroup ownership can't be transferred to an External Contact