This is a multicenter, single-arm, open-label study to characterize long-term safety and tolerability of MY008211A tablets and to provide access to MY008211A tablets to patients with PNH who have completed Phase 2 or 3 studies with MY008211A tablets.

The purpose of this open-label, single arm, multicenter study is to evaluate the long-term safety, tolerability and efficacy of MY008211A tablets in patients with PNH and to provide access to patients who have completed (without tapering down) Phase 2 and Phase 3 trials and derived benefit from MY008211A treatment.

Inclusion Criteria:

1. Patients who have previously received and completed MY008211A study treatment, and are judged by the investigator to have treatment benefit and may benefit from continued treatment of MY008211A.
2. Prior vaccinations against Neisseria meningitidis, Streptococcus pneumoniae and Haemophilus influenzae infections.

Exclusion Criteria:

1. History of recurrent invasive infections caused by encapsulated organisms, e.g. meningococcus or pneumococcus.
2. Known or suspected hereditary complement deficiency.
3. Any comorbidity or medical condition (including but not limited to any active systemic bacterial, viral or fungal infection or malignancy) that, in the opinion of the investigator, could put the subject at increased risk or potentially confound study data.