Why should the locked data be sent to Tencent editor?

In Tencent documents, we can set a certain area to be edited by ourselves.

Then, we can choose the command of the protection restriction here. At this point, this area is the area we just set, so we can see that the area we choose here corresponds to this one-to-one. At this time, we can set this permission here and only edit it ourselves.

Or we can set it so that the designated person can edit it, and others can't edit it naturally.