Study to Assess Efficacy and Safety of HSK39297 Tablets in Patients With LN

First onset or recurrence of lupus nephritis (for subjects who have received MMF treatment previously and have experienced recurrence, the investigator and the sponsor jointly assess the benefit based on the study's medication regimen to determine whether they can be enrolled);

Female subjects with reproductive capacity [excluding those who have undergone surgical sterilization (hysterectomy, bilateral tubal ligation, bilateral oophorectomy) at least 6 weeks prior to screening or who are postmenopausal (defined as having no menstruation for 12 months, with no other medical cause)]; a negative pregnancy test must be confirmed during the screening period. The subject must agree not to attempt pregnancy and not to donate oocytes from the date of signing the informed consent form until at least 30 days after the last administration of investigational product, and must use effective contraception; male subjects must agree not to donate sperm for at least 90 days from the date of signing the informed consent form until at least 90 days after the last administration of investigational product, and must use highly effective contraception with their female partners (see Appendix 3).

The subject has previously failed to respond to treatment with MMF or other mofetil mycophenolate drugs, as assessed by the investigator.

Allergy to the investigational product or MMF, or contraindications to MMF and glucocorticoids.