Inclusion Criteria:
* Aged 18-65 years old, including the boundary value, no gender restriction;
* Subjects meeting the 2016 ACR/EULAR classification criteria for Sjögren's syndrome, and also meet the diagnostic criteria for ocular involvement.
* The ocular involvement symptoms and signs of these patients cannot be relieved after at least 3 months of conventional therapy, including artificial tears and topical or systemic corticosteroids.
* Extra-ocular manifestations of Sjögren's syndrome clinically stable.
* Subjects and their partners agree to use effective non-pharmacological contraception from screening through 6 months after the last dose and have no plans for conception during this period.
* Willing to participate in the study, understand and sign the informed consent form (ICF).
Exclusion Criteria:
* Known allergy to any component of the investigational drug.
* Active ocular infection.
* Presence of other significant ocular disease or trauma diagnosed prior to enrollment, including but not limited to glaucoma, uveitis, retinopathy, chemical injury, or thermal burns.
* History of any ocular surgery within the preceding 6 months, including cataract surgery.
* Participation in another interventional clinical study.
* Use of any ophthalmic medication that may interfere with the study outcomes, such as other stem-cell-derived products.
* Having serious underlying diseases of the heart, brain vessels, liver, kidneys, and hematopoietic system.
* Pregnant or lactating women; women of childbearing potential must employ an effective contraceptive method (e.g., intrauterine device, oral contraceptive, or condom) during the study and for at least 3 months after the final dose of study drug.
* Subjects deemed unsuitable for participation in this trial by the investigator.
