diff --git a/README.md b/README.md
index 5056edb..2c4652d 100644
--- a/README.md
+++ b/README.md
@@ -53,12 +53,14 @@ func main() {
 		ClientType: "pc",
 		NotifyURL:  "https://merchant.example.com/pay/notify",
 		ReturnURL:  "https://merchant.example.com/pay/return",
+		ExpireTime: "15", // 可选，分钟数或绝对时间；默认 10 分钟
 	})
 	if err != nil {
 		log.Fatal(err)
 	}
 
 	fmt.Println(order.CashierURL)
+	fmt.Println(order.ExpireTime, order.PageToken)
 }
 ```
 
diff --git a/client_test.go b/client_test.go
index 3d77dd2..02e8a44 100644
--- a/client_test.go
+++ b/client_test.go
@@ -32,6 +32,9 @@ func TestSubmitPostsSignedForm(t *testing.T) {
 		if params["sign_type"] != "MD5" {
 			t.Fatalf("sign_type = %s", params["sign_type"])
 		}
+		if params["expire_time"] != "15" {
+			t.Fatalf("expire_time = %s", params["expire_time"])
+		}
 		if !VerifySign(params, "secret") {
 			t.Fatalf("invalid sign: %s", params["sign"])
 		}
@@ -43,7 +46,9 @@ func TestSubmitPostsSignedForm(t *testing.T) {
 				"order_no":     "P123",
 				"out_trade_no": params["out_trade_no"],
 				"amount":       100,
-				"cashier_url":  "http://pay.test/cashier/?orderNo=P123",
+				"cashier_url":  "http://pay.test/cashier/P123",
+				"expire_time":  "2026-07-21T10:15:00+08:00",
+				"page_token":   "page-token-1",
 			},
 		})
 	}))
@@ -59,11 +64,12 @@ func TestSubmitPostsSignedForm(t *testing.T) {
 		Name:       "test",
 		Money:      "1.00",
 		Type:       "alipay",
+		ExpireTime: "15",
 	})
 	if err != nil {
 		t.Fatal(err)
 	}
-	if resp.OrderNo != "P123" || resp.Amount != 100 {
+	if resp.OrderNo != "P123" || resp.Amount != 100 || resp.PageToken != "page-token-1" || resp.ExpireTime == nil {
 		t.Fatalf("unexpected response: %+v", resp)
 	}
 }
diff --git a/cmd/007pay/main.go b/cmd/007pay/main.go
index 8119390..e5ec43a 100644
--- a/cmd/007pay/main.go
+++ b/cmd/007pay/main.go
@@ -91,6 +91,7 @@ func submit(cfg globalConfig, args []string) error {
 	fs.StringVar(&req.ReturnURL, "return-url", "", "merchant sync return URL")
 	fs.StringVar(&req.Body, "body", "", "order description")
 	fs.StringVar(&req.Attach, "attach", "", "extra data")
+	fs.StringVar(&req.ExpireTime, "expire-time", "", "order lifetime in minutes or an absolute expiration time (default 10 minutes)")
 	if err := fs.Parse(args); err != nil {
 		return err
 	}
diff --git a/types.go b/types.go
index c26ca80..7f77a78 100644
--- a/types.go
+++ b/types.go
@@ -20,6 +20,9 @@ type SubmitRequest struct {
 	ReturnURL  string
 	Body       string
 	Attach     string
+	// ExpireTime accepts a positive lifetime in minutes, RFC3339, or YYYY-MM-DD HH:mm:ss.
+	// Empty uses the platform default of 10 minutes.
+	ExpireTime string
 }
 
 func (r SubmitRequest) params() map[string]string {
@@ -33,14 +36,17 @@ func (r SubmitRequest) params() map[string]string {
 		"return_url":   r.ReturnURL,
 		"body":         r.Body,
 		"attach":       r.Attach,
+		"expire_time":  r.ExpireTime,
 	})
 }
 
 type SubmitResponse struct {
-	OrderNo    string `json:"order_no"`
-	OutTradeNo string `json:"out_trade_no"`
-	Amount     int64  `json:"amount"`
-	CashierURL string `json:"cashier_url"`
+	OrderNo    string     `json:"order_no"`
+	OutTradeNo string     `json:"out_trade_no"`
+	Amount     int64      `json:"amount"`
+	CashierURL string     `json:"cashier_url"`
+	ExpireTime *time.Time `json:"expire_time"`
+	PageToken  string     `json:"page_token"`
 }
 
 type QueryRequest struct {
@@ -64,6 +70,7 @@ type QueryResponse struct {
 	Completed      bool       `json:"completed"`
 	ChannelChecked bool       `json:"channel_checked"`
 	PaidAt         *time.Time `json:"paid_at"`
+	ExpireTime     *time.Time `json:"expire_time"`
 }
 
 type RefundRequest struct {
@@ -128,6 +135,7 @@ type Order struct {
 	IsManual       bool       `json:"is_manual"`
 	PaidAt         *time.Time `json:"paid_at"`
 	CreatedAt      *time.Time `json:"created_at"`
+	ExpireTime     *time.Time `json:"expire_time"`
 }
 
 type ManualRequest struct {