 This study is a prospective, randomized, controlled randomized, parallel group, concealed allocation, double-blinded trial. All patients undergoing breast cancer operation will be randomized 1:1 to the treatment intervention with general anesthesia as an adjunct to Stellate-ganglion block with 0.25 ropivacaine hydrochloride or saline. The objective of the trial is to evaluate the postoperative sleep quality of patients undergoing breast cancer operation with Stellate-ganglion block 0.25 ropivacaine hydrochloride or saline. 