你You need to have projects (self-created projects and joined projects) or friends.
[Step 1]
Click "Project" to enter the project list, select a project.
[Step 2]
Go to the "Drawings Management" section of the project, click the "Upload Drawings" button, and a pop-up will appear allowing you to select the source of the drawings.
[Step 3]
Select a drawing to upload.
In addition, you can also send drawings to the project to upload them.