If you just haven’t paid the annual fee for the current year, you can make up the payment within 6 months after it is overdue, and you will have to pay a late fee.
If the patent expires due to non-payment and you receive a notice that the patent rights are deemed to have been abandoned, you can request to restore the rights within 2 months, and pay the rights restoration fee, patent annual fee and late fee, and get recover.
If it has been more than 2 months since you received the notice that the patent rights are deemed to have been abandoned, it is basically impossible to recover.