After ACL reconstruction, regular review is very important. The time points for post-operative review are: two weeks, six weeks, three months, six months, one year and two years after surgery. Among them, the two-week postoperative review is mainly to remove the stitches and check the wound healing at the same time. Out-of-town patients who are not convenient to return to the hospital to have their stitches removed after surgery at Peking University Third Hospital can have their stitches removed at the local hospital. Each patient will be given a Post-Acute Cruciate Ligament Reconstruction Rehabilitation Plan at the time of discharge, and must follow the plan for rehabilitation. If there is any doubt, it is best to consult one’s primary surgeon. At six weeks and three months post-operatively, the patient will also need to have a timely review. The purpose of this review is to see how well the patient is doing and whether the rehabilitation is progressing to standard. For example, some patients do not do well in rehab and may have joint adhesions, which can be corrected in time, but if they miss this time, they may actually develop joint adhesions, and then they will need to consider a second surgery. Squatting exercises (recommended to start at 10 weeks after surgery) MRI is generally not required at two weeks, six weeks and three months after surgery. The purpose of this review is twofold: first, to see if damage has occurred to other structures in the joint, and second, to see how the ligaments have grown after surgery. If the ligaments have recovered very well, the patient may be allowed to perform some exercises at this time.