To Evaluate the Efficacy and Safety of SAL056 for Postmenopausal Women with Osteoporosis at High Fracture Risk

The trial consists of a screening period (4 weeks), an open-label treatment period (up to 48 weeks), and a follow-up period (1 weeks), totaling approximately 53 weeks. Subjects who withdraw early will be asked to complete an end of treatment visit, and a safety follow-up visit 2 weeks after the end of treatment visit.

Inclusion Criteria:

1. Postmenopausal women with the ability to live independently (≥45 and ≤80 years);
2. The patient has a body mass index(BMI) of 18.0 kg/m2 to 30 kg/m2； The patient has one of the following diagnostic criteria for osteoporosis and subject has at least 2 consecutive vertebrae region (L1 to L4) that are evaluable by dual-energy x-ray absorptiometry (DXA)，a) History of hip/vertebra fragility fracture and bone mineral density (BMD) T-score ≤-1; b）the axial bone (lumbar , femoral neck or total hip) mineral density (BMD) T-score ≤-2.50;c) Bone mineral density (BMD) T-score ≥-2.5 and ≤-1 with proximal humerus, pelvis, or distal forearm end fragility fracture

Exclusion Criteria:

1. In addition to postmenopausal osteoporosis, the other diseases affecting bone metabolism;
2. Patients with other diseases affecting calcium or bone metabolism;
3. Received anti-osteoporosis treatment that does not meet protocol requirements;
4. Received medication that affects bone metabolism prior to screening, or is planned to use prohibited drugs/non-drug therapy under the protocol during the study period;
5. Patients requiring long-term or continuous use of digoxin and other digitalis drugs during the trial;
6. Patients with other severe underlying diseases； Patients with abnormal indicators that does not meet protocol requirements during the screening periodlaboratory tests