anchor.diff:                  {
                       "coursid": "Course ID",
                       "coursename": "Course name",
  -                    "time": "[[1 to 7,1 to 6]]",
  +                    "time": [1 to 7,1 to 6],
                       "teacher": "Teacher",
                       "classroom": "Classroom",
  -                    "weeks": "array of [1,16]"
  +                    "weeks": array of 0/1 whose length equals 16
                   }
               ]
           }
  
positive.code:         {
              "message": "Success",
              "username": "Request username",
              "existed": "true/false",
              "information": {
                  "studentnumber": Stundent number,
                  "department": "Department",
  
negative.code:                 {
                      "coursid": "Course ID",
                      "coursename": "Course name",
                      "time": [1 to 7,1 to 6],
                      "teacher": "Teacher",
                      "classroom": "Classroom"
                  }
  