Why is the lead code bound and not displayed?

There is no traffic on the mobile phone or there are too many visitors.

Lead codes are bound and not displayed. First, there is no communication travel code because the mobile phone traffic is not turned on and the mobile phone traffic function is turned off. Second, because too many people visited, the system crashed and needed to wait patiently.

Old people or children at home need to apply for "code with relatives" to receive "nucleic acid code" on their behalf, and only after the application is successful can they receive "code with relatives". If you can't successfully apply for "relatives with application code" for the time being, you can use your ID card or registration ID number to register on the spot.