after failing to pay the annual fee on time, there is still a half-year overdue period and a two-month recovery period, which is about ten months. After that, it is very difficult to recover.
Once this time is exceeded, you have two years to recover, but it is very difficult. It is only possible to recover due to force majeure and the consent of the bureau-level leaders in China National Intellectual Property Administration.
and you haven't paid the annual fee for your patent for four years, so it can't be restored.