diff --git a/calendar.go b/calendar.go
index 2ed1b9e..eceab62 100644
--- a/calendar.go
+++ b/calendar.go
@@ -10,7 +10,7 @@ import (
 )
 
 func (s *Student) GetSchoolCalendar() (*SchoolCalendar, error) {
-	resp, err := s.GetWithSession(constants.SchoolCalendarURL)
+	resp, err := s.GetWithIdentifier(constants.SchoolCalendarURL)
 
 	if err != nil {
 		return nil, err
diff --git a/course.go b/course.go
index 31c7cef..4073eac 100644
--- a/course.go
+++ b/course.go
@@ -15,7 +15,7 @@ import (
 
 // 获取我的学期
 func (s *Student) GetTerms() (*Term, error) {
-	resp, err := s.GetWithSession(constants.CourseURL)
+	resp, err := s.GetWithIdentifier(constants.CourseURL)
 
 	if err != nil {
 		return nil, err
diff --git a/jwch.go b/jwch.go
index c5a2fa1..ca17029 100644
--- a/jwch.go
+++ b/jwch.go
@@ -7,7 +7,6 @@ import (
 	"strings"
 
 	"github.com/west2-online/jwch/errno"
-	"github.com/west2-online/jwch/utils"
 
 	"github.com/antchfx/htmlquery"
 	"github.com/go-resty/resty/v2"
@@ -32,41 +31,26 @@ func (s *Student) WithUser(id, password string) *Student {
 	return s
 }
 
-func (s *Student) WithSession(session string) *Student {
-	s.LoginData.Session = session
-	return s
-}
-
-// SaveLoginData save session and cookie to localfile
-func (s *Student) SaveLoginData(filePath string) error {
-	return utils.SaveData(filePath, []byte(utils.PrintStruct(s.LoginData)))
+func (s *Student) SetIdentifier(identifier string) {
+	s.Identifier = identifier
 }
 
-func (s *Student) GetLoginDataJSON() string {
-	return utils.PrintStruct(s.LoginData)
+func (s *Student) SetCookies(cookies []*http.Cookie) {
+	s.cookies = cookies
+	s.client.SetCookies(cookies)
 }
 
 func (s *Student) ClearLoginData() {
-	s.LoginData = LoginData{}
-	s.client.Cookies = s.LoginData.Cookies
-}
-
-func (s *Student) SetLoginData(data LoginData) {
-	s.LoginData = data
-	s.client = s.client.SetCookies(s.LoginData.Cookies)
-}
-
-func (s *Student) AppendCookies(cookies []*http.Cookie) {
-	s.LoginData.Cookies = append(s.LoginData.Cookies, cookies...)
+	s.cookies = []*http.Cookie{}
+	s.client.Cookies = []*http.Cookie{}
 }
 
 func (s *Student) NewRequest() *resty.Request {
 	return s.client.R()
 }
 
-// GetWithSession returns parse tree for the resp of the request.
-func (s *Student) GetWithSession(url string) (*html.Node, error) {
-	resp, err := s.NewRequest().SetHeader("Referer", "https://jwcjwxt1.fzu.edu.cn/").SetQueryParam("id", s.LoginData.Session).Get(url)
+func (s *Student) GetWithIdentifier(url string) (*html.Node, error) {
+	resp, err := s.NewRequest().SetHeader("Referer", "https://jwcjwxt1.fzu.edu.cn/").SetQueryParam("id", s.Identifier).Get(url)
 
 	if err != nil {
 		return nil, errno.HTTPQueryError.WithErr(err)
@@ -80,25 +64,9 @@ func (s *Student) GetWithSession(url string) (*html.Node, error) {
 	return htmlquery.Parse(bytes.NewReader(resp.Body()))
 }
 
-// GetWithSessionRaw returns the raw data of response
-func (s *Student) GetWithSessionRaw(url string) (*resty.Response, error) {
-	resp, err := s.NewRequest().SetHeader("Referer", "https://jwcjwxt1.fzu.edu.cn/").SetQueryParam("id", s.LoginData.Session).Get(url)
-
-	if err != nil {
-		return nil, errno.HTTPQueryError.WithErr(err)
-	}
-
-	// 会话过期 TODO: 判断条件有点简陋
-	if strings.Contains(string(resp.Body()), "重新登录") {
-		return nil, errno.SessionExpiredError
-	}
-
-	return resp, nil
-}
-
 // PostWithSession returns parse tree for the resp of the request.
-func (s *Student) PostWithSession(url string, formdata map[string]string) (*html.Node, error) {
-	resp, err := s.NewRequest().SetHeader("Referer", "https://jwcjwxt1.fzu.edu.cn/").SetQueryParam("id", s.LoginData.Session).SetFormData(formdata).Post(url)
+func (s *Student) PostWithSession(url string, formData map[string]string) (*html.Node, error) {
+	resp, err := s.NewRequest().SetHeader("Referer", "https://jwcjwxt1.fzu.edu.cn/").SetQueryParam("id", s.Identifier).SetFormData(formData).Post(url)
 
 	s.NewRequest().EnableTrace()
 
diff --git a/jwch_test.go b/jwch_test.go
index 592b4e6..c9ebe66 100644
--- a/jwch_test.go
+++ b/jwch_test.go
@@ -43,32 +43,6 @@ func Test_Login(t *testing.T) {
 	}
 }
 
-func Test_LoginFromLocal(t *testing.T) {
-	var res LoginData
-	err := utils.JSONUnmarshalFromFile(localfile, &res)
-	if err != nil {
-		t.Error(err)
-	}
-	stu.SetLoginData(res)
-
-	err = stu.CheckSession()
-
-	if err != nil {
-		t.Log("session expire, relogin")
-		err = stu.Login()
-		if err != nil {
-			t.Error(err)
-		}
-		err = stu.CheckSession()
-
-		if err != nil {
-			t.Error(err)
-		}
-
-		stu.SaveLoginData(localfile)
-	}
-}
-
 func Test_GetCourse(t *testing.T) {
 	if !islogin {
 		err := login()
diff --git a/mark.go b/mark.go
index 012de76..16cdb50 100644
--- a/mark.go
+++ b/mark.go
@@ -13,7 +13,7 @@ import (
 
 // 获取成绩，由于教务处缺陷，这里会返回全部的成绩
 func (s *Student) GetMarks() (resp []*Mark, err error) {
-	res, err := s.GetWithSession(constants.MarksQueryURL)
+	res, err := s.GetWithIdentifier(constants.MarksQueryURL)
 
 	if err != nil {
 		return nil, err
@@ -62,7 +62,7 @@ func (s *Student) GetMarks() (resp []*Mark, err error) {
 
 // 获取CET成绩
 func (s *Student) GetCET() error {
-	resp, err := s.GetWithSession(constants.CETQueryURL)
+	resp, err := s.GetWithIdentifier(constants.CETQueryURL)
 
 	if err != nil {
 		return err
diff --git a/model.go b/model.go
index 7f3fbf4..cf04a59 100644
--- a/model.go
+++ b/model.go
@@ -1,23 +1,19 @@
 package jwch
 
 import (
-	"net/http"
-
 	"github.com/go-resty/resty/v2"
+	"net/http"
 )
 
-// 本地数据
-type LoginData struct {
-	Cookies []*http.Cookie `json:"cookies"`
-	Session string         `json:"session"`
-}
-
 // 学生对象
 type Student struct {
-	ID        string        `json:"id"`         // 学号
-	Password  string        `json:"password"`   // 密码
-	LoginData LoginData     `json:"login_data"` // 登录凭证
-	client    *resty.Client // Request对象
+	ID       string         `json:"id"`       // 学号
+	Password string         `json:"password"` // 密码
+	cookies  []*http.Cookie //cookies中将包含session_id和其他数据
+	//如果我们使用client进行登陆的话，此时该字段失效，因为client会在登录时自动保存登陆凭证（session）
+	//所以该字段用于其他服务调用时传递登陆凭证
+	Identifier string        //位于url上id=....的一个标识符，主要用于组成url
+	client     *resty.Client // Request对象
 }
 
 // 学生信息详情
diff --git a/room.go b/room.go
index 1f2843c..6ca62df 100644
--- a/room.go
+++ b/room.go
@@ -89,7 +89,7 @@ func (s *Student) GetQiShanEmptyRoom(req EmptyRoomReq) ([]string, error) {
 
 // 获取VIEWSTATE和EVENTVALIDATION
 func (s *Student) getEmptyRoomState() (map[string]string, error) {
-	resp, err := s.GetWithSession(constants.ClassroomQueryURL)
+	resp, err := s.GetWithIdentifier(constants.ClassroomQueryURL)
 	if err != nil {
 		return nil, err
 	}
diff --git a/user.go b/user.go
index 44b8faf..f5519b9 100644
--- a/user.go
+++ b/user.go
@@ -72,7 +72,6 @@ func (s *Student) Login() error {
 		return errno.LoginCheckFailedError
 	}
 
-	// 获取session的id和num
 	id := regexp.MustCompile(`id=(.*?)&`).FindStringSubmatch(err.Error())[1]
 	num := regexp.MustCompile(`num=(.*?)&`).FindStringSubmatch(err.Error())[1]
 
@@ -98,7 +97,7 @@ func (s *Student) Login() error {
 		return errno.SSOLoginFailedError
 	}
 
-	// 获取session
+	// 获取cookies
 	resp, err = s.NewRequest().SetHeaders(map[string]string{
 		"Referer": "https://jwcjwxt1.fzu.edu.cn/",
 		"Origin":  "https://jwcjwxt2.fzu.edu.cn/",
@@ -111,20 +110,20 @@ func (s *Student) Login() error {
 	}).Get("https://jwcjwxt2.fzu.edu.cn:81/loginchk_xs.aspx")
 
 	// 保存这部分Cookie，这部分Cookie是用来后续鉴权的[ASP.NET_SessionId]
-	s.AppendCookies(resp.RawResponse.Cookies())
+	s.SetCookies(resp.RawResponse.Cookies())
 
 	// 这里是err == nil 因为禁止了重定向，正常登录是会出现异常的
 	if err == nil {
 		return errno.GetSessionFailedError
 	}
 
-	session := regexp.MustCompile(`id=(.*?)&`).FindStringSubmatch(err.Error())
+	data := regexp.MustCompile(`id=(.*?)&`).FindStringSubmatch(err.Error())
 
-	if len(session) < 1 {
+	if len(data) < 1 {
 		return errno.GetSessionFailedError
 	}
 
-	s.WithSession(session[1])
+	s.SetIdentifier(data[1])
 
 	return nil
 }
@@ -135,7 +134,7 @@ func (s *Student) CheckSession() error {
 	// 旧版处理过程： 查询Body中是否含有[当前用户]这四个字
 
 	// 检查过期
-	resp, err := s.GetWithSession(constants.UserInfoURL)
+	resp, err := s.GetWithIdentifier(constants.UserInfoURL)
 	if err != nil {
 		return err
 	}
@@ -156,7 +155,7 @@ func (s *Student) CheckSession() error {
 
 // 获取学生个人信息
 func (s *Student) GetInfo() (resp *StudentDetail, err error) {
-	res, err := s.GetWithSession(constants.UserInfoURL)
+	res, err := s.GetWithIdentifier(constants.UserInfoURL)
 
 	if err != nil {
 		return nil, err