Which county are you from? Just write the abbreviation of X- Jiao 20 10No. XX, depending on your bureau number. Just go down the document number. It should be noted that the X-character is an official document. If it is a general document issued to subordinate units, the X-character can be used for easy distinction and sorting. Sometimes the office of the Education Bureau can write X-word (or send) 2065438 when issuing a document.