diff --git a/bybit_api_client.go b/bybit_api_client.go
index b9cb64b..7702c99 100644
--- a/bybit_api_client.go
+++ b/bybit_api_client.go
@@ -248,3 +248,10 @@ func (c *Client) NewPositionService(params map[string]interface{}) *PositionClie
 	}
 
 }
+
+func (c *Client) NewPreUpgradeService(params map[string]interface{}) *PreUpgradeClient {
+	return &PreUpgradeClient{
+		c:      c,
+		params: params,
+	}
+}
diff --git a/examples/account/transaction_log.go b/examples/account/transaction_log.go
new file mode 100644
index 0000000..e3f1dc5
--- /dev/null
+++ b/examples/account/transaction_log.go
@@ -0,0 +1,22 @@
+package main
+
+import (
+	"context"
+	"fmt"
+	bybit "github.com/wuhewuhe/bybit.go.api"
+)
+
+func main() {
+	PlaceTrade()
+}
+
+func PlaceTrade() {
+	client := bybit.NewBybitHttpClient("8wYkmpLsMg10eNQyPm", "Ouxc34myDnXvei54XsBZgoQzfGxO4bkr2Zsj", bybit.WithBaseURL(bybit.TESTNET))
+	params := map[string]interface{}{"category": "linear", "settleCoin": "USDT", "limit": 10}
+	orderResult, err := client.NewPositionService(params).GetPositionList(context.Background())
+	if err != nil {
+		fmt.Println(err)
+		return
+	}
+	fmt.Println(bybit.PrettyPrint(orderResult))
+}
diff --git a/examples/pre_uprgade/order_history.go b/examples/pre_uprgade/order_history.go
new file mode 100644
index 0000000..1903598
--- /dev/null
+++ b/examples/pre_uprgade/order_history.go
@@ -0,0 +1,22 @@
+package main
+
+import (
+	"context"
+	"fmt"
+	bybit "github.com/wuhewuhe/bybit.go.api"
+)
+
+func main() {
+	PlaceTrade()
+}
+
+func PlaceTrade() {
+	client := bybit.NewBybitHttpClient("8wYkmpLsMg10eNQyPm", "Ouxc34myDnXvei54XsBZgoQzfGxO4bkr2Zsj", bybit.WithBaseURL(bybit.TESTNET))
+	params := map[string]interface{}{"category": "linear", "settleCoin": "USDT", "limit": 10}
+	orderResult, err := client.NewPreUpgradeService(params).GetPreUpgradeOrderHistory(context.Background())
+	if err != nil {
+		fmt.Println(err)
+		return
+	}
+	fmt.Println(bybit.PrettyPrint(orderResult))
+}
diff --git a/models/accountResponse.go b/models/accountResponse.go
new file mode 100644
index 0000000..03c3533
--- /dev/null
+++ b/models/accountResponse.go
@@ -0,0 +1,28 @@
+package models
+
+type TransactionLogInfo struct {
+	List           []TransactionLogEntry `json:"list"`
+	NextPageCursor string                `json:"nextPageCursor"`
+}
+
+type TransactionLogEntry struct {
+	Symbol          string `json:"symbol"`
+	Category        string `json:"category"`
+	Side            string `json:"side"`
+	TransactionTime string `json:"transactionTime"`
+	Type            string `json:"type"`
+	Qty             string `json:"qty"`
+	Size            string `json:"size"`
+	Currency        string `json:"currency"`
+	TradePrice      string `json:"tradePrice"`
+	Funding         string `json:"funding"`
+	Fee             string `json:"fee"`
+	CashFlow        string `json:"cashFlow"`
+	Change          string `json:"change"`
+	CashBalance     string `json:"cashBalance"`
+	FeeRate         string `json:"feeRate"`
+	BonusChange     string `json:"bonusChange"`
+	TradeID         string `json:"tradeId"`
+	OrderID         string `json:"orderId"`
+	OrderLinkId     string `json:"orderLinkId"`
+}
diff --git a/models/assetResponse.go b/models/assetResponse.go
new file mode 100644
index 0000000..a620b0a
--- /dev/null
+++ b/models/assetResponse.go
@@ -0,0 +1,34 @@
+package models
+
+type DeliveryRecordInfo struct {
+	Category       string                `json:"category"`
+	List           []DeliveryRecordEntry `json:"list"`
+	NextPageCursor string                `json:"nextPageCursor"`
+}
+
+type DeliveryRecordEntry struct {
+	DeliveryTime  int64  `json:"deliveryTime"`
+	Symbol        string `json:"symbol"`
+	Side          string `json:"side"`
+	Position      string `json:"position"`
+	DeliveryPrice string `json:"deliveryPrice"`
+	Strike        string `json:"strike"`
+	Fee           string `json:"fee"`
+	DeliveryPnl   string `json:"deliveryRpl"`
+}
+
+type USDCSettlementInfo struct {
+	Category       string            `json:"category"`
+	List           []SettlementEntry `json:"list"`
+	NextPageCursor string            `json:"nextPageCursor"`
+}
+
+type SettlementEntry struct {
+	Symbol          string `json:"symbol"`
+	Side            string `json:"side"`
+	Size            string `json:"size"`
+	SessionAvgPrice string `json:"sessionAvgPrice"`
+	MarkPrice       string `json:"markPrice"`
+	RealisedPnl     string `json:"realisedPnl"`
+	CreatedTime     string `json:"createdTime"`
+}
diff --git a/pre_upgrade.go b/pre_upgrade.go
new file mode 100644
index 0000000..eb48829
--- /dev/null
+++ b/pre_upgrade.go
@@ -0,0 +1,145 @@
+package bybit_connector
+
+import (
+	"context"
+	"encoding/json"
+	"github.com/wuhewuhe/bybit.go.api/handlers"
+	"net/http"
+)
+
+type PreUpgradeClient struct {
+	c      *Client
+	params map[string]interface{}
+}
+
+func (s *PreUpgradeClient) GetPreUpgradeOrderHistory(ctx context.Context, opts ...RequestOption) (res *ServerResponse, err error) {
+	if err = handlers.ValidateParams(s.params); err != nil {
+		return nil, err
+	}
+	r := &request{
+		method:   http.MethodGet,
+		endpoint: "/v5/pre-upgrade/order/history",
+		secType:  secTypeSigned,
+	}
+	r.setParams(s.params)
+	data, err := s.c.callAPI(ctx, r, opts...)
+	if err != nil {
+		return nil, err
+	}
+	res = new(ServerResponse)
+	err = json.Unmarshal(data, res)
+	if err != nil {
+		return nil, err
+	}
+	return res, nil
+}
+
+func (s *PreUpgradeClient) GetPreUpgradeExecutionList(ctx context.Context, opts ...RequestOption) (res *ServerResponse, err error) {
+	if err = handlers.ValidateParams(s.params); err != nil {
+		return nil, err
+	}
+	r := &request{
+		method:   http.MethodGet,
+		endpoint: "/v5/pre-upgrade/execution/list",
+		secType:  secTypeSigned,
+	}
+	r.setParams(s.params)
+	data, err := s.c.callAPI(ctx, r, opts...)
+	if err != nil {
+		return nil, err
+	}
+	res = new(ServerResponse)
+	err = json.Unmarshal(data, res)
+	if err != nil {
+		return nil, err
+	}
+	return res, nil
+}
+
+func (s *PreUpgradeClient) GetPreUpgradeClosedPnl(ctx context.Context, opts ...RequestOption) (res *ServerResponse, err error) {
+	if err = handlers.ValidateParams(s.params); err != nil {
+		return nil, err
+	}
+	r := &request{
+		method:   http.MethodGet,
+		endpoint: "/v5/pre-upgrade/position/closed-pnl",
+		secType:  secTypeSigned,
+	}
+	r.setParams(s.params)
+	data, err := s.c.callAPI(ctx, r, opts...)
+	if err != nil {
+		return nil, err
+	}
+	res = new(ServerResponse)
+	err = json.Unmarshal(data, res)
+	if err != nil {
+		return nil, err
+	}
+	return res, nil
+}
+
+func (s *PreUpgradeClient) GetPreUpgradeTransactionLog(ctx context.Context, opts ...RequestOption) (res *ServerResponse, err error) {
+	if err = handlers.ValidateParams(s.params); err != nil {
+		return nil, err
+	}
+	r := &request{
+		method:   http.MethodGet,
+		endpoint: "/v5/pre-upgrade/account/transaction-log",
+		secType:  secTypeSigned,
+	}
+	r.setParams(s.params)
+	data, err := s.c.callAPI(ctx, r, opts...)
+	if err != nil {
+		return nil, err
+	}
+	res = new(ServerResponse)
+	err = json.Unmarshal(data, res)
+	if err != nil {
+		return nil, err
+	}
+	return res, nil
+}
+
+func (s *PreUpgradeClient) GetPreUpgradeOptionDeliveryRecord(ctx context.Context, opts ...RequestOption) (res *ServerResponse, err error) {
+	if err = handlers.ValidateParams(s.params); err != nil {
+		return nil, err
+	}
+	r := &request{
+		method:   http.MethodGet,
+		endpoint: "/v5/pre-upgrade/asset/delivery-record",
+		secType:  secTypeSigned,
+	}
+	r.setParams(s.params)
+	data, err := s.c.callAPI(ctx, r, opts...)
+	if err != nil {
+		return nil, err
+	}
+	res = new(ServerResponse)
+	err = json.Unmarshal(data, res)
+	if err != nil {
+		return nil, err
+	}
+	return res, nil
+}
+
+func (s *PreUpgradeClient) GetPreUpgradeUsdcSettlement(ctx context.Context, opts ...RequestOption) (res *ServerResponse, err error) {
+	if err = handlers.ValidateParams(s.params); err != nil {
+		return nil, err
+	}
+	r := &request{
+		method:   http.MethodGet,
+		endpoint: "/v5/pre-upgrade/asset/settlement-record",
+		secType:  secTypeSigned,
+	}
+	r.setParams(s.params)
+	data, err := s.c.callAPI(ctx, r, opts...)
+	if err != nil {
+		return nil, err
+	}
+	res = new(ServerResponse)
+	err = json.Unmarshal(data, res)
+	if err != nil {
+		return nil, err
+	}
+	return res, nil
+}