Yes, you can. You don't have to use the work email address of the teacher's work unit, you can use an ordinary email address, such as 163, gmail, QQ and so on.

The school will send an email to the recommender's mailbox, requesting to upload a recommendation letter or write a recommendation letter directly to the applicant. It is generally recommended to upload the recommendation letter directly. Print out the stationery of the recommended credit school in advance, ask the teacher to sign it, and then scan it.