Will the property code declared by Guan E expire?

It will expire and need to be saved in time.

For users who have applied for "Wan E declaration" but have not saved it in time or lost it, they can log in to the official WeChat account of "Wan E declaration", click "Declaration" in the lower left corner and select "Password inquiry". After that, enter the interface, enter the personal name, ID number and mobile phone number, and obtain the password of "Wan E Declaration" after submission.

With the "ten thousand e declaration", there is no need to declare Yuekang code. With Yuekang code, you still have to apply for "Wan E" to live and work in Dongguan. The "Universal Declaration" is mandatory, and Yuekang Code is only a service of personal choice.