Why did China Mobile SMS notify Jianyang Office that the Ziyang Mobile phone number has returned?

Dear users, according to Sichuan Provincial People's Government's "Reply on Agreeing to Change the Hosting Relationship of County-level Jianyang City" No. 90 of Chuanfu Han (2016), Jianyang City was replaced by Chengdu City in May 2016. Tube. At present, your number has been assigned to Chengdu, and the effective and reserved original Ziyang services you have handled are still valid. At the same time, you can also handle the rates and marketing activities on sale in Chengdu. If you have any questions, please contact the local mobile business office or 10086. Thank you for your understanding and support.