Inclusion Criteria:  Healthy infants aged 2 months (minimum 6 weeks), healthy infants aged 3 months, healthy infants aged 7 ~ 11 months, healthy infants aged 12~ 23 months, healthy children aged 2~ 5 years, healthy adolescent and children aged 6~ 17 years, healthy adults aged 18~ 49 years； Proven legal identification and vaccination certificate (vaccination certificate is required for those aged 5 and below)； The subject and/or guardian can understand and voluntarily sign the informed consent form.  Exclusion Criteria:  Have received pneumococcal polysaccharide vaccine or pneumococcal polysaccharide conjugate vaccine; Have Bacterial pneumonia or invasive pneumococcal infectious disease (IPD) caused by pneumococcus confirmed by sputum culture; History of asthma, history of allergy to the vaccine or vaccine components, or serious adverse reactions to the vaccine, such as urticaria, dyspnea, and angioedema; Congenital malformations or developmental disorders, genetic defects, severe malnutrition, etc.; Autoimmune disease or immunodeficiency / immunosuppression; Severe chronic diseases, severe cardiovascular diseases, hypertension and diabetes that cannot be controlled by drugs, liver or kidney diseases, malignant tumors, etc.; Severe neurological disease (epilepsy, convulsions or convulsions) or mental illness; History of thyroidectomy, absence of spleen, functional absence of spleen, and absence of spleen or splenectomy due to any circumstance; Diagnosed abnormal blood coagulation function (eg, lack of blood coagulation factors, blood coagulopathy, abnormal platelets) or obvious bruising or blood coagulation; Immunosuppressive therapy, cytotoxic therapy, inhaled corticosteroids (excluding allergic rhinitis corticosteroid spray therapy, acute noncomplicated dermatitis superficial corticosteroid therapy) in the past 6 months; History of alcohol or drug abuse; Receipt of blood products within in the past 3 months; Receipt of other investigational drugs in the past 30 days; Receipt of attenuated live vaccines in the past 14 days; Receipt of inactivated or subunit vaccines in the past 7 days; Acute diseases or acute exacerbation of chronic diseases in the past 7 days; Axillary temperature >37.0°C; According to the investigator's judgment, the subject has any other factors that are not suitable for participating in the clinical trial.