The study is being conducted to evaluate the safety, tolerability, efficacy, pharmacokinetics, and pharmacodynamics of 3HP-2827 in the treatment of unresectable or metastatic solid tumors with FGFR2 alterations. Patients will be enrolled in two stages: dose escalation stage (Stage I) and expansion stage (Stage II).

Inclusion Criteria:

• The patient is willing and able to provide written informed consent and has the ability to comply with the study protocol
• Men or women, age ≥ 18 years at the time of signing informed consent.
• Histologically or cytologically confirmed surgically unresectable, locally advanced, metastatic solid tumor.
• ECOG score is 0 or 1.
• An expected survival of ≥ 12 weeks.
• Evaluable or measurable disease per RECIST v1.1.
• Adequate organ function, as measured by laboratory values.

Exclusion Criteria:

• Active brain metastases.
• Have other malignancies within the past 3 years.
• The toxicity from previous anti-tumor treatment has not recovered to ≤ grade 1.
• Clinically significant corneal or retinal disease/keratopathy.
• Clinically significant cardiovascular disorders.
• Failure to swallow, chronic diarrhea, or presence of other factors affecting drug absorption.
• Known to be allergic to any study drug or any of its excipients.
• Any other diseases or clinical laboratory, etc that may affect the interpretation of the results, or renders the patients at high risk from treatment complications.