Which unit of scale in Cocos 3.5+?

Cocos Creator
#1

There is a question, which units using for 3d model when we import FBX exported from Maya? how to make it correct, we quite confused.
if we compare with Unity there are some import settings such as - Scale factor and Convert Units.

#2

Creator provides the documentation of DCC export, you can refer to it?

http://docs.cocos.com/creator/manual/en/asset/model/dcc-export-mesh.html

#3

In the Creator editor, 1m of 3D space is 1