A Study of Neoadjuvant TCHpy（Pyrotinib ，Trastuzumab，Carboplatin and Paclitaxel）for ER+/HER2+ Breast Cancer

"Pyrotinib tablets: 320mg qd, oral administration after breakfast, 21 days for 1 cycle, continuous administration of 6 cycles.~Trastuzumab: The first cycle was 8mg/kg, the second to sixth cycle was 6mg/kg, 21 days was 1 cycle, continuous administration of 6 cycles.~Albuminpaclitaxel: On the first day of cycle 1, 260mg/m2 was given intravenously, 21 days for 1 cycle, and 6 consecutive cycles were given.~Carboplatin: Endogenous creatinine clearance was calculated using the Cockcroft formula, with AUC 5 for the 1st to 6th cycle and 1 cycle for the 21st day and 6 consecutive cycles of administration"