I suggest you Baidu the sound of WeChat shake, find MP3 or M4R and download it to your computer (I found this, so the landlord can go in and listen to it and see if it is that sound: /read-htm-tid-5854527.html).
Then install an iTools software on the computer and connect the mobile phone to the computer.
Find "Promotion Video" in the device and click the ringtone on the right.
Select the previously downloaded MP3 in "Import" at the top, and then import it directly to use in ringtones.
I hope the landlord will adopt it ~