Disabling data traffic notification "A total of consumption during the lock screen" on LeEco Cool Changer S1
Here is something you can try:

Long press on the notification, you will then see an icon like this "i" press on it, and you will see a setting for disabling notifications. Set it to 'off' and you will not see it again.

There must be a more direct way of doing this, but I don't have your phone to test it.