According to the latest postcode table issued by China Post Office, the postcode of Daxing is 102600. Postal code is a mail delivery address coding method compiled by postal department, which is used to identify the administrative division, street and house number of mail address, which is helpful to improve the accuracy and efficiency of mail delivery. Therefore, if you need to send a letter or express mail to Daxing, Beijing, you can use the postal code 102600 to fill in the mailing address to ensure that the mail can be delivered to the destination accurately.