If you would like to sync any document lists from any Sharepoint site to your local computer, you would log in to your WISS M365 account at http://o365.wiss.cn then navigate to the document list you want in your chosen Sharepoint site. Then press the SYNC button at the top.
Once you press SYNC you will be asked which documents you'd like to sync then sync will begin. Each synced document library will then be listed separately in your File Explorer (in WinOS) with its own folder. It will be labelled with the name of the Sharepoint site, a dash then the name of the document library. In the example below, this is how it looks in Windows File Explorer. Here, I have synced 2 documents lists from the Sharepoint site called WISS IT Team. One document library is called 'Documents' and the other is called 'Software':
You might also like to view https://support.microsoft.com/en-us/office/sync-sharepoint-and-teams-files-with-your-computer-6de9ede8-5b6e-4503-80b2-6190f3354a88