diff --git a/README.md b/README.md
index 29cf6a04..689c7481 100644
--- a/README.md
+++ b/README.md
@@ -31,24 +31,26 @@
     - 📦 Cache system
 8. 🎈 对话记忆功能
     - 🎈 Conversation memorization
-9. 🎁 图片生成功能
-    - 🎁 Image generation
-10. 🔔 PWA 应用
+9. 👋 对话分享
+    - 👋 Conversation sharing
+10. 🎁 图片生成功能
+     - 🎁 Image generation
+11. 🔔 PWA 应用
     - 🔔 PWA application
-11. ⚡ Token 计费系统
+12. ⚡ Token 计费系统
     - ⚡ Token billing system
-12. 📚 逆向工程模型支持
+13. 📚 逆向工程模型支持
     - 📚 Reverse engineering model support
-13. 🌏 国际化支持
+14. 🌏 国际化支持
     - 🌏 Internationalization support
       - 🇨🇳 简体中文
       - 🇺🇸 English
       - 🇷🇺 Русский
-14. 🍎 主题切换
+15. 🍎 主题切换
     - 🍎 Theme switching
-15. 🥪 Key 中转服务
+16. 🥪 Key 中转服务
     - 🥪 Key relay service
-16. 🔨 多模型支持
+17. 🔨 多模型支持
     - 🔨 Multi-model support
 
 
diff --git a/app/src/conf.ts b/app/src/conf.ts
index d65e2ec8..c9f8461a 100644
--- a/app/src/conf.ts
+++ b/app/src/conf.ts
@@ -1,7 +1,7 @@
 import axios from "axios";
 import { Model } from "./conversation/types.ts";
 
-export const version = "3.5.6";
+export const version = "3.5.7";
 export const dev: boolean = window.location.hostname === "localhost";
 export const deploy: boolean = true;
 export let rest_api: string = "http://localhost:8094";
diff --git a/app/src/conversation/history.ts b/app/src/conversation/history.ts
index 31be451a..5969e785 100644
--- a/app/src/conversation/history.ts
+++ b/app/src/conversation/history.ts
@@ -23,11 +23,7 @@ export async function loadConversation(
 ): Promise<ConversationInstance> {
   const resp = await axios.get(`/conversation/load?id=${id}`);
   if (resp.data.status) return resp.data.data as ConversationInstance;
-  return {
-    id,
-    name: "",
-    message: [{ role: "assistant", content: "load conversation failed" }],
-  };
+  return { id, name: "", message: [] };
 }
 
 export async function deleteConversation(
diff --git a/auth/controller.go b/auth/controller.go
index 8c118cdd..bb179008 100644
--- a/auth/controller.go
+++ b/auth/controller.go
@@ -3,6 +3,7 @@ package auth
 import (
 	"chat/utils"
 	"github.com/gin-gonic/gin"
+	"strings"
 )
 
 type BuyForm struct {
@@ -141,3 +142,36 @@ func BuyAPI(c *gin.Context) {
 		})
 	}
 }
+
+func InviteAPI(c *gin.Context) {
+	user := GetUserByCtx(c)
+	if user == nil {
+		return
+	}
+
+	db := utils.GetDBFromContext(c)
+	code := strings.TrimSpace(c.Query("code"))
+	if len(code) == 0 {
+		c.JSON(200, gin.H{
+			"status": false,
+			"error":  "invalid code",
+			"quota":  0.,
+		})
+		return
+	}
+
+	if quota, err := user.UseInvitation(db, code); err != nil {
+		c.JSON(200, gin.H{
+			"status": false,
+			"error":  err.Error(),
+			"quota":  0.,
+		})
+		return
+	} else {
+		c.JSON(200, gin.H{
+			"status": true,
+			"error":  "success",
+			"quota":  quota,
+		})
+	}
+}
diff --git a/auth/invitation.go b/auth/invitation.go
new file mode 100644
index 00000000..4c277c8a
--- /dev/null
+++ b/auth/invitation.go
@@ -0,0 +1,107 @@
+package auth
+
+import (
+	"chat/utils"
+	"database/sql"
+	"errors"
+	"fmt"
+)
+
+type Invitation struct {
+	Id     int64   `json:"id"`
+	Code   string  `json:"code"`
+	Quota  float32 `json:"quota"`
+	Type   string  `json:"type"`
+	Used   bool    `json:"used"`
+	UsedId int64   `json:"used_id"`
+}
+
+func GenerateCodes(db *sql.DB, num int, quota float32, t string) ([]string, error) {
+	arr := make([]string, 0)
+	idx := 0
+	for idx < num {
+		code := fmt.Sprintf("%s-%s", t, utils.GenerateChar(24))
+		if err := GenerateCode(db, code, quota, t); err != nil {
+			// unique constraint
+			if errors.Is(err, sql.ErrNoRows) {
+				continue
+			}
+			return nil, fmt.Errorf("failed to generate code: %w", err)
+		}
+		arr = append(arr, code)
+		idx++
+	}
+
+	return arr, nil
+}
+
+func GenerateCode(db *sql.DB, code string, quota float32, t string) error {
+	_, err := db.Exec(`
+		INSERT INTO invitation (code, quota, type)
+		VALUES (?, ?, ?)
+	`, code, quota, t)
+	return err
+}
+
+func GetInvitation(db *sql.DB, code string) (*Invitation, error) {
+	row := db.QueryRow(`
+		SELECT id, code, quota, type, used, used_id
+		FROM invitation
+		WHERE code = ?
+	`, code)
+	var invitation Invitation
+	err := row.Scan(&invitation.Id, &invitation.Code, &invitation.Quota, &invitation.Type, &invitation.Used, &invitation.UsedId)
+	if err != nil {
+		if errors.Is(err, sql.ErrNoRows) {
+			return nil, fmt.Errorf("invitation code not found")
+		}
+		return nil, fmt.Errorf("failed to get invitation: %w", err)
+	}
+	return &invitation, nil
+}
+
+func (i *Invitation) IsUsed() bool {
+	return i.Used
+}
+
+func (i *Invitation) Use(db *sql.DB, userId int64) error {
+	_, err := db.Exec(`
+		UPDATE invitation SET used = TRUE, used_id = ? WHERE id = ?
+	`, userId, i.Id)
+	return err
+}
+
+func (i *Invitation) GetQuota() float32 {
+	return i.Quota
+}
+
+func (i *Invitation) UseInvitation(db *sql.DB, user User) error {
+	if i.IsUsed() {
+		return fmt.Errorf("this invitation has been used")
+	}
+
+	if err := i.Use(db, user.GetID(db)); err != nil {
+		if errors.Is(err, sql.ErrNoRows) {
+			return fmt.Errorf("invitation code not found")
+		}
+		return fmt.Errorf("failed to use invitation: %w", err)
+	}
+
+	if !user.IncreaseQuota(db, i.GetQuota()) {
+		return fmt.Errorf("failed to increase quota for user")
+	}
+
+	return nil
+}
+
+func (u *User) UseInvitation(db *sql.DB, code string) (float32, error) {
+	if invitation, err := GetInvitation(db, code); err != nil {
+		return 0, err
+	} else {
+		if err := invitation.UseInvitation(db, *u); err != nil {
+			return 0, fmt.Errorf("failed to use invitation: %w", err)
+		}
+
+		return invitation.GetQuota(), nil
+	}
+}
diff --git a/auth/router.go b/auth/router.go
index 389f34ef..b73277b4 100644
--- a/auth/router.go
+++ b/auth/router.go
@@ -11,4 +11,5 @@ func Register(app *gin.Engine) {
 	app.POST("/buy", BuyAPI)
 	app.GET("/subscription", SubscriptionAPI)
 	app.POST("/subscribe", SubscribeAPI)
+	app.GET("/invite", InviteAPI)
 }
diff --git a/connection/database.go b/connection/database.go
index 816725a9..4a4826c9 100644
--- a/connection/database.go
+++ b/connection/database.go
@@ -33,6 +33,7 @@ func ConnectMySQL() *sql.DB {
 	CreateQuotaTable(db)
 	CreateSubscriptionTable(db)
 	CreateApiKeyTable(db)
+	CreateInvitationTable(db)
 	return db
 }
 
@@ -151,3 +152,23 @@ func CreateApiKeyTable(db *sql.DB) {
 		log.Fatal(err)
 	}
 }
+
+func CreateInvitationTable(db *sql.DB) {
+	_, err := db.Exec(`
+		CREATE TABLE IF NOT EXISTS invitation (
+		  id INT PRIMARY KEY AUTO_INCREMENT,
+		  code VARCHAR(255) UNIQUE,
+		  quota DECIMAL(6, 4),
+		  type VARCHAR(255),
+		  used BOOLEAN DEFAULT FALSE,
+		  used_id INT,
+		  created_at DATETIME DEFAULT CURRENT_TIMESTAMP,
+		  updated_at DATETIME DEFAULT CURRENT_TIMESTAMP,
+		  UNIQUE KEY (used_id, type),
+		  FOREIGN KEY (used_id) REFERENCES auth(id)
+		);
+	`)
+	if err != nil {
+		log.Fatal(err)
+	}
+}
diff --git a/middleware/throttle.go b/middleware/throttle.go
index 8d00b36a..d452d2cb 100644
--- a/middleware/throttle.go
+++ b/middleware/throttle.go
@@ -38,6 +38,7 @@ var limits = map[string]Limiter{
 	"/subscription": {Duration: 1, Count: 2},
 	"/chat":         {Duration: 1, Count: 5},
 	"/conversation": {Duration: 1, Count: 5},
+	"/invite":       {Duration: 7200, Count: 20},
 }
 
 func GetPrefixMap[T comparable](s string, p map[string]T) *T {