All of a sudden, there are no short messages, not one left, and nothing in the draft box. Can it be restored by China Mobile?

That should be the virus in your memory card. All the information and materials are stored in your own mobile phone. China Mobile can't help users recover. Now you have only one way, take it to the master who repaired your mobile phone and restore your mobile phone disk. Let's see if it works. You can also get it yourself and download software like EasyRecovery Pro, but it depends on whether it is covered. I hope my answer is helpful to you.