• (1)Capable of understanding and voluntarily signing the informed consent form; able to complete the trial in accordance with the protocol requirements; (2)Age 18-75 years; no gender restrictions; (3)Clinically diagnosed/suspected as renal cell carcinoma or clinically diagnosed/suspected recurrence/metastasis after RCC treatment; (4)At least 1 measurable solid lesion in the subject, which can be accurately and continuously measured using modified RECIST criteria (version 1.1); (5)ECOG performance status score of 0-2; (6)Laboratory parameters must meet:

‣ Hematology: WBC ≥4.0×10⁹/L or neutrophils ≥1.5×10⁹/L, PLT ≥100×10⁹/L, Hb ≥90g/L; PT or APTT ≤1.5×ULN (upper limit of normal);

⁃ Liver and kidney function: T-Bil ≤1.5×ULN, ALT/AST ≤2.5×ULN or ≤5×ULN (for subjects with liver metastasis), ALP ≤2.5×ULN (if bone or liver metastasis present, ALP ≤4.5×ULN); BUN ≤1.5×ULN, SCr ≤1.5×ULN;

⁃ Other routine tests within normal ranges or deemed acceptable by the investigator; (7)Expected survival ≥12 weeks; (8) Female subjects: Effective contraception (defined as sterilization, intrauterine hormone device, condoms, contraceptives/agents, abstinence, or partner vasectomy) must be used during the study and for 6 months post-study; Male subjects: Agreement to use contraception during the study and for 6 months post-study.