diff --git a/Detector/DetCEPCv4/compact/CepCBeamPipe_v01_01.xml b/Detector/DetCEPCv4/compact/CepCBeamPipe_v01_01.xml
index e308fbf9b6d644db404727fea2499eaa37ac2aa6..b29393b660f1966209aecdca9f5bf9ce720fe7d6 100644
--- a/Detector/DetCEPCv4/compact/CepCBeamPipe_v01_01.xml
+++ b/Detector/DetCEPCv4/compact/CepCBeamPipe_v01_01.xml
@@ -23,7 +23,7 @@
     <constant name="BeamPipe_SecondSeparated_zmax" value="2200*mm"/>
     <constant name="BeamPipe_QD0_zmax"             value="3950*mm"/>
     <constant name="BeamPipe_QF1_zmin"             value="4450*mm"/>
-    <constant name="BeamPipe_QF1_zmax"             value="4450*mm"/>
+    <constant name="BeamPipe_QF1_zmax"             value="5910*mm"/>
     <constant name="BeamPipe_end_z"                value="7050*mm"/>
     
     <constant name="BeamPipe_Central_inner_radius"  value="14*mm"/>
diff --git a/Detector/DetCRD/compact/CRD_common_v01/Beampipe_v01_01.xml b/Detector/DetCRD/compact/CRD_common_v01/Beampipe_v01_01.xml
index 0335b1edba5ca5218e972edc08d1770bb0553cd6..1d57df45b51dfe153cdb02dc2e3f9ec4753392b9 100644
--- a/Detector/DetCRD/compact/CRD_common_v01/Beampipe_v01_01.xml
+++ b/Detector/DetCRD/compact/CRD_common_v01/Beampipe_v01_01.xml
@@ -12,7 +12,7 @@
     <constant name="ForkAsymThickness" value="BeamPipe_Dnstream_inner_radius+BeamPipe_Cu_thickness-BeamPipe_Upstream_inner_radius"/>
     <constant name="BeamPipe_QD0_zmax"             value="3950*mm"/>
     <constant name="BeamPipe_QF1_zmin"             value="4450*mm"/>
-    <constant name="BeamPipe_QF1_zmax"             value="4450*mm"/>
+    <constant name="BeamPipe_QF1_zmax"             value="5910*mm"/>
     <constant name="BeamPipe_QF1_inner_radius"     value="20.5*mm"/>
     <constant name="BeamPipe_Iron_thickness"       value="2.5*mm"/>
   </define>
diff --git a/Detector/DetCRD/compact/CRD_common_v01/Beampipe_v01_02.xml b/Detector/DetCRD/compact/CRD_common_v01/Beampipe_v01_02.xml
index d4ffee89efd39cee437341b2349fc7d117f0208a..24f79c29b5ed686aa1c95c4e0656bf63a37da58d 100644
--- a/Detector/DetCRD/compact/CRD_common_v01/Beampipe_v01_02.xml
+++ b/Detector/DetCRD/compact/CRD_common_v01/Beampipe_v01_02.xml
@@ -13,7 +13,7 @@
     <!--constant name="ForkAsymThickness" value="BeamPipe_Dnstream_inner_radius+BeamPipe_Cu_thickness-BeamPipe_Upstream_inner_radius"/-->
     <constant name="BeamPipe_QD0_zmax"             value="3950*mm"/>
     <constant name="BeamPipe_QF1_zmin"             value="4450*mm"/>
-    <constant name="BeamPipe_QF1_zmax"             value="4450*mm"/>
+    <constant name="BeamPipe_QF1_zmax"             value="5910*mm"/>
     <constant name="BeamPipe_QF1_inner_radius"     value="20.5*mm"/>
     <constant name="BeamPipe_Iron_thickness"       value="2.5*mm"/>
   </define>