What is the short message code of China Telecom's mobile phone users to inquire about the handling history of business?

Hello, the business handling history code you are concerned about: send 1000 1 to 100 1 to get the operation menu of SMS business hall and reply to handle the business step by step. You will get all kinds of business codes, including your business processing history. Thank you for your support to Telecom! I wish your family a happy life!