A Clinical Study of HRS-6209 Combined With Other Treatment Regimens in Patients With Breast Cancer

This study is testing HRS-6209 — a new targeted drug — in combination with other cancer treatments in women with breast cancer that has stopped responding to prior therapies. **You may be eligible if...** - You are a woman between 18 and 75 years old - You have breast cancer with evidence of progression on imaging after your most recent treatment - You have at least one measurable tumor outside the brain - Your estimated survival is more than 3 months - Your physical performance score is ECOG 0–1 - You use effective contraception if you are of childbearing potential **You may NOT be eligible if...** - You have uncontrolled brain metastases - You have serious heart, liver, or kidney problems - You are pregnant or breastfeeding - You cannot tolerate the study medications based on prior reactions Talk to your doctor to see if this trial is right for you.