diff --git a/bnc/config_por_mar.go b/bnc/config_por_mar.go
index 9dd6e58..51b4b92 100644
--- a/bnc/config_por_mar.go
+++ b/bnc/config_por_mar.go
@@ -37,7 +37,10 @@ type PortfolioMarginAccountPosition struct {
 	PositionSide           FuturesPositionSide `json:"positionSide"`
 	SignPositionAmt        float64             `json:"positionAmt,string"`
 	BreakEvenPrice         float64             `json:"breakEvenPrice,string"`
-	UpdateTime             int                 `json:"updateTime"`
+	UpdateTime             int64               `json:"updateTime"`
+
+	// just for CM position
+	MaxQty string `json:"maxQty"`
 }
 
 func (p PortfolioMarginAccountPosition) AbsPositionAmt() float64 {
@@ -62,6 +65,19 @@ var PortfolioMarginAccountDetailConfig = cex.ReqConfig[cex.NilReqData, Portfolio
 	RespBodyUnmarshaler:   fuBodyUnmshWrapper(cex.StdBodyUnmarshaler[PortfolioMarginAccountDetail]),
 }
 
+var PortfolioMarginAccountCMDetailConfig = cex.ReqConfig[cex.NilReqData, PortfolioMarginAccountDetail]{
+	ReqBaseConfig: cex.ReqBaseConfig{
+		BaseUrl:          PapiBaseUrl,
+		Path:             PapiV1 + "/cm/account",
+		Method:           http.MethodGet,
+		IsUserData:       true,
+		UserTimeInterval: 0,
+		IpTimeInterval:   0,
+	},
+	HTTPStatusCodeChecker: HTTPStatusCodeChecker,
+	RespBodyUnmarshaler:   fuBodyUnmshWrapper(cex.StdBodyUnmarshaler[PortfolioMarginAccountDetail]),
+}
+
 type PortfolioMarginAccountBalanceParams struct {
 	Symbol string `s2m:"symbol,omitempty"`
 }
diff --git a/bnc/user.go b/bnc/user.go
index 5ad18f6..1d2aa6f 100644
--- a/bnc/user.go
+++ b/bnc/user.go
@@ -110,6 +110,10 @@ func (u *User) PortfolioMarginAccountDetail(opts ...cex.CltOpt) (*resty.Response
 	return cex.Request(u, PortfolioMarginAccountDetailConfig, nil, opts...)
 }
 
+func (u *User) PortfolioMarginAccountCMDetail(opts ...cex.CltOpt) (*resty.Response, PortfolioMarginAccountDetail, cex.RequestError) {
+	return cex.Request(u, PortfolioMarginAccountCMDetailConfig, nil, opts...)
+}
+
 //func (u *User) PortfolioMarginBalance(asset string, opts ...cex.CltOpt) (*resty.Response, PortfolioMarginBalance, cex.RequestError) {
 //	return cex.Request(u, PortfolioMarginBalanceConfig, PortfolioMarginAccountBalanceParams{asset}, opts...)
 //}
diff --git a/bnc/user_test.go b/bnc/user_test.go
index f9b8268..c343a87 100644
--- a/bnc/user_test.go
+++ b/bnc/user_test.go
@@ -243,6 +243,10 @@ func TestUser_PortfolioMarginAccountDetail(t *testing.T) {
 	userTestChecker(newTestVIPPortmarUser().PortfolioMarginAccountDetail())
 }
 
+func TestUser_PortfolioMarginAccountCMDetail(t *testing.T) {
+	userTestChecker(newTestVIPPortmarUser().PortfolioMarginAccountCMDetail())
+}
+
 func TestUser_PortfolioMarginAccountInformation(t *testing.T) {
 	userTestChecker(newTestVIPPortmarUser().PortfolioMarginAccountInformation())
 }