This study is an open-label, multicenter, randomized controlled study. It is planned to include 258 patients with HR +/HER2- advanced breast cancer with visceral metastases. Eligible subjects will be randomized 1:1 to receive dalpiciclib in combination with endocrine therapy and metronomic capecitabine chemotherapy in the experimental arm and dalpiciclib in combination with endocrine therapy in the control arm. Randomization was stratified by the number of lines of therapy for recurrent metastases (0 versus 1) and endocrine therapy (AI versus fulvestrant).