This is a multicenter, open-label, dose-escalation, dose-expansion, and cohort-expansion Phase I/II clinical study to evaluate safety, tolerability, pharmacokinetics, antitumor efficacy and to determine the maximum tolerated dose (MTD) and recommended Phase 2 doses (RP2D) of cisplatin micelle injection in patients with advanced malignant solid tumors. This study is divided into two stages, the first stage (stage I) is the dose escalation and dose expansion study of cisplatin micelle injection, to determine the maximum tolerated dose (MTD), and to initially explore the recommended dose of phase II clinical practice (RP2D). The second stage (stage II) is the cisplatin micelle injection cohort expansion study to evaluate the efficacy and safety of cisplatin micelle injection (HA132) in patients with advanced solid tumors.

Inclusion Criteria:

1. Aged 18 to 70 years (inclusive), no gender limitation;

2. Stage I: patients with advanced, recurrent or metastatic solid tumors confirmed by histology or cytology, and no standard treatment, or ineffective or intolerable to standard treatment, or those who are not eligible to receive standard treatment; Stage II: Pending;

3. Have at least one measurable lesion according to RECIST v1.1;

4. Eastern Cooperative Oncology Group (ECOG) physical performance status score of 0-1;

5. Life expectancy of at least 3 months;

6. Major organ function within 7 days prior to treatment, meeting the following criteria (have not received blood transfusion, EPO, G-CSF or other medical supportive treatment within 14 days before study drug administration):

   1. Blood routine:

      1. Neutrophil absolute value (ANC) ≥ 1.5 × 10^9/L;
      2. Platelet (PLT) ≥ 90× 10^9/L;
      3. Hemoglobin (HB) ≥ 90 g/L;

   2. Renal function:

      1. Creatinine (Cr) ≤ 1.5 × ULN;
      2. Creatinine clearance (CrcL) ≥ 60 mL/min (Using the Cockcroft-Gault formula);

   3. Liver function:

      1. Total bilirubin (TBIL) ≤ 1.5 × ULN;
      2. Aspartate amino transferase( AST) and Alanine amino transferase (ALT) 2.5 × ULN, or ≤ 5 × ULN in patients with hepatic metastasis or primary liver cancer;
      3. Alkaline phosphatase (ALP) ≤ 2.5 ×ULN, or ≤ 5 × ULN in patients with hepatic metastasis or primary liver cancer;

7. Women of childbearing age should agree that contraceptive measures (such as intrauterine device or condoms) must be used within study period and within 6 months after the end of the study; the serum or urine pregnancy tests is negative within 7days prior to the study for non-lactating patients; men should agree to use contraceptive measures during the study period and within 6 months after the end of the study period;

8. Patients must give informed consent to this study before the trial, and voluntarily sign the written informed consent.

Exclusion Criteria:

1. The patient has received chemotherapy, biological therapy, endocrine therapy, targeted therapy, immunotherapy and other anti-tumor treatments or participated in other clinical trials within 4 weeks before the first use of the study drug, or within 5 half-lives of the treatment drug, whichever is longer;
2. The patient has received platinum-based therapy within 3 months prior to the study drug;
3. The patient has undergone major organ surgery (excluding needle biopsy) or suffered significant trauma within 4 weeks before the first use of the study drug;
4. The patient has received nephrotoxic or ototoxic drugs such as cephalosporin, aminoglycoside antibiotics, amphotericin B within 14 days before the first use of the study drug;
5. Those who are allergic to any excipients of the study drug or cisplatin and other platinum-based drug or have a history of severe allergies;
6. Any unresolved toxicities from prior anti-tumor therapy (including radiotherapy) greater than Common Terminology Criteria for Adverse Events (CTCAE) Grade 1(except for alopecia or other adverse reactions judged no safety risk by the investigators);
7. Patients with clinical symptoms of central nervous system metastases or meningeal metastases, or there is other evidence that the patient's central nervous system metastases or meningeal metastases have not been controlled, and the investigators judge that they are not suitable for enrollment;
8. The patient has active infectious disease;
9. The patient has a history of autoimmune disease, immunodeficiency, including positive HIV test, or has other acquired, congenital immunodeficiency diseases, or a history of organ transplantation;
10. Active hepatitis B (hepatitis B virus titer > 1000 copies/mL or 200 IU/mL), prophylactic antiviral therapy other than interferon is allowed; hepatitis C virus infection;
11. Patients with a history of severe cardiovascular disease, or severe renal dysfunction, bone marrow insufficiency, chickenpox, herpes zoster, gout, hyperuricemia, or a history of other serious systemic diseases, as judged by the investigator who are not suitable to participate in clinical trials;
12. Known alcohol or drug dependence;
13. Patients with ototoxicity (except high-frequency elderly hearing loss) or other neurotoxicity ≥ grade 2 assessed by audiometer;
14. Patients with known visual impairment who are deemed unsuitable for participation in this study by the investigator;
15. Previous history of clear neurological or psychiatric disorders, including epilepsy or dementia;
16. Pregnant or breastfeeding females;
17. Patients with history of other malignancies within 3 years before the first use of the investigational drug, except for the following: cured basal cell or squamous cell skin cancer, superficial bladder cancer, prostate cancer in situ, cervical cancer in situ, breast cancer in situ, etc. locally curable cancer, or persistent disease-free survival within 3 years;
18. The investigator believes that the patients are not suitable to participate in this clinical study for other reasons.