Health code after unbinding did not do nucleic acid still show. Health code unbound, if reapply, the previous record will still have, now is the era of big data, and health code is specifically for the new crown epidemic set up, is based on personal identity information, so as long as you are the same ID card number to apply for, even if the phone number is not the same, the health code must be the previous information, the trip, the prevention of the pre-needle, the date of the nucleic acid test and so on will have a record.