diff --git a/app/controllers/users/clas_controller.rb b/app/controllers/users/clas_controller.rb
index e3a4de0c2..d5e93436e 100644
--- a/app/controllers/users/clas_controller.rb
+++ b/app/controllers/users/clas_controller.rb
@@ -8,6 +8,7 @@ class Users::ClasController <  Users::BaseController
         ActiveRecord::Base.transaction do
             Users::UserClaForm.new(user_cla_params).validate!
             @user_cla = UserCla.build(user_cla_params, @_observed_user.id)
+            render_ok
         end
         rescue Exception => e
             uid_logger_error(e.message)
diff --git a/app/models/cla.rb b/app/models/cla.rb
index ff5b8780f..11f86dcd6 100644
--- a/app/models/cla.rb
+++ b/app/models/cla.rb
@@ -35,4 +35,9 @@ class Cla < ApplicationRecord
                     pr_need: params[:pr_need]
                 )
     end
+
+
+    def fresh_count
+        update(count:self.users.count)
+    end
 end
diff --git a/app/models/user_cla.rb b/app/models/user_cla.rb
index a1accb41e..005533ce7 100644
--- a/app/models/user_cla.rb
+++ b/app/models/user_cla.rb
@@ -22,6 +22,9 @@ class UserCla < ApplicationRecord
     belongs_to :cla
 # identity 0: 教师教授 1: 学生, 2: 专业人士, 3: 开发者
     enum state: { deafult: 0, signed: 1, failed: 2}
+    after_create do 
+        cla.fresh_count
+    end
 
     def self.build(params,user_id)
         self.create!(user_id: user_id,
diff --git a/app/views/organizations/clas/_detail.json.jbuilder b/app/views/organizations/clas/_detail.json.jbuilder
index 39c4e6a33..b9d50183b 100644
--- a/app/views/organizations/clas/_detail.json.jbuilder
+++ b/app/views/organizations/clas/_detail.json.jbuilder
@@ -3,3 +3,4 @@ json.content cla.content
 json.key cla.key
 json.name cla.name
 json.pr_need cla.pr_need
+json.count cla.count
\ No newline at end of file