Utidelone Capsule Plus Capecitabine (CAP) for Metastatic Breast Cancer

"Utidelone Capsule: 60mg/m2/d, once daily, oral on an empty stomach, continuously administered for 1-5 days; Capecitabine tablets: 1000mg/m2, twice a day (daily dose 2000mg/m2), once in the morning and once in the evening, taken orally within 30 minutes after meals, and continuously administered for 14 days from day 1 to day 14.~Every 21 days is a cycle ."