diff --git a/AMSS_NCKU_source/prolongrestrict_cell.f90 b/AMSS_NCKU_source/prolongrestrict_cell.f90
index 8d2907f..90607b1 100644
--- a/AMSS_NCKU_source/prolongrestrict_cell.f90
+++ b/AMSS_NCKU_source/prolongrestrict_cell.f90
@@ -1932,20 +1932,23 @@
   real*8, dimension(1:3) :: base
   integer,dimension(3) :: lbc,ubc,lbf,ubf,lbp,ubp,lbpc,ubpc
 ! when if=1 -> ic=0, this is different to vertex center grid 
-  real*8, dimension(-2:extc(1),-2:extc(2),-2:extc(3))   :: funcc
+  real*8, dimension(-2:extc(1),-2:extc(2),-2:extc(3))   :: funcc
   integer,dimension(3) :: cxI
-  integer :: i,j,k,ii,jj,kk
+  integer :: i,j,k,ii,jj,kk,px,py,pz
   real*8, dimension(6,6) :: tmp2
   real*8, dimension(6) :: tmp1
   integer, dimension(extf(1)) :: cix
   integer, dimension(extf(2)) :: ciy
   integer, dimension(extf(3)) :: ciz
-  logical, dimension(extf(1)) :: evenx
-  logical, dimension(extf(2)) :: eveny
-  logical, dimension(extf(3)) :: evenz
-
-  real*8, parameter :: C1=7.7d1/8.192d3,C2=-6.93d2/8.192d3,C3=3.465d3/4.096d3
-  real*8, parameter :: C6=6.3d1/8.192d3,C5=-4.95d2/8.192d3,C4=1.155d3/4.096d3
+  integer, dimension(extf(1)) :: pix
+  integer, dimension(extf(2)) :: piy
+  integer, dimension(extf(3)) :: piz
+
+  real*8, parameter :: C1=7.7d1/8.192d3,C2=-6.93d2/8.192d3,C3=3.465d3/4.096d3
+  real*8, parameter :: C6=6.3d1/8.192d3,C5=-4.95d2/8.192d3,C4=1.155d3/4.096d3
+  real*8, dimension(6,2), parameter :: WC = reshape((/&
+      C1,C2,C3,C4,C5,C6,&
+      C6,C5,C4,C3,C2,C1/), (/6,2/))
 
   integer::imini,imaxi,jmini,jmaxi,kmini,kmaxi
   integer::imino,imaxo,jmino,jmaxo,kmino,kmaxo
@@ -2029,17 +2032,29 @@
   do i = imino,imaxo
      ii = i + lbf(1) - 1
      cix(i) = ii/2 - lbc(1) + 1
-     evenx(i) = (ii/2*2 == ii)
+     if(ii/2*2 == ii)then
+        pix(i) = 1
+     else
+        pix(i) = 2
+     endif
   enddo
   do j = jmino,jmaxo
      jj = j + lbf(2) - 1
      ciy(j) = jj/2 - lbc(2) + 1
-     eveny(j) = (jj/2*2 == jj)
+     if(jj/2*2 == jj)then
+        piy(j) = 1
+     else
+        piy(j) = 2
+     endif
   enddo
   do k = kmino,kmaxo
      kk = k + lbf(3) - 1
      ciz(k) = kk/2 - lbc(3) + 1
-     evenz(k) = (kk/2*2 == kk)
+     if(kk/2*2 == kk)then
+        piz(k) = 1
+     else
+        piz(k) = 2
+     endif
   enddo
 
   call symmetry_bd(3,extc,func,funcc,SoA)
@@ -2051,6 +2066,9 @@
        cxI(1) = cix(i)
        cxI(2) = ciy(j)
        cxI(3) = ciz(k)
+       px = pix(i)
+       py = piy(j)
+       pz = piz(k)
 
        if(any(cxI+3 > extc)) write(*,*)"error in prolong"
 #if 0
@@ -2140,34 +2158,19 @@
          endif
        endif
 #else 
-       if(evenz(k))then
-             tmp2= C1*funcc(cxI(1)-2:cxI(1)+3,cxI(2)-2:cxI(2)+3,cxI(3)-2)+&
-                   C2*funcc(cxI(1)-2:cxI(1)+3,cxI(2)-2:cxI(2)+3,cxI(3)-1)+&
-                   C3*funcc(cxI(1)-2:cxI(1)+3,cxI(2)-2:cxI(2)+3,cxI(3)  )+&
-                   C4*funcc(cxI(1)-2:cxI(1)+3,cxI(2)-2:cxI(2)+3,cxI(3)+1)+&
-                   C5*funcc(cxI(1)-2:cxI(1)+3,cxI(2)-2:cxI(2)+3,cxI(3)+2)+&
-                   C6*funcc(cxI(1)-2:cxI(1)+3,cxI(2)-2:cxI(2)+3,cxI(3)+3)
-       else
-             tmp2= C6*funcc(cxI(1)-2:cxI(1)+3,cxI(2)-2:cxI(2)+3,cxI(3)-2)+&
-                   C5*funcc(cxI(1)-2:cxI(1)+3,cxI(2)-2:cxI(2)+3,cxI(3)-1)+&
-                   C4*funcc(cxI(1)-2:cxI(1)+3,cxI(2)-2:cxI(2)+3,cxI(3)  )+&
-                   C3*funcc(cxI(1)-2:cxI(1)+3,cxI(2)-2:cxI(2)+3,cxI(3)+1)+&
-                   C2*funcc(cxI(1)-2:cxI(1)+3,cxI(2)-2:cxI(2)+3,cxI(3)+2)+&
-                   C1*funcc(cxI(1)-2:cxI(1)+3,cxI(2)-2:cxI(2)+3,cxI(3)+3)
-       endif
+       tmp2= WC(1,pz)*funcc(cxI(1)-2:cxI(1)+3,cxI(2)-2:cxI(2)+3,cxI(3)-2)+&
+             WC(2,pz)*funcc(cxI(1)-2:cxI(1)+3,cxI(2)-2:cxI(2)+3,cxI(3)-1)+&
+             WC(3,pz)*funcc(cxI(1)-2:cxI(1)+3,cxI(2)-2:cxI(2)+3,cxI(3)  )+&
+             WC(4,pz)*funcc(cxI(1)-2:cxI(1)+3,cxI(2)-2:cxI(2)+3,cxI(3)+1)+&
+             WC(5,pz)*funcc(cxI(1)-2:cxI(1)+3,cxI(2)-2:cxI(2)+3,cxI(3)+2)+&
+             WC(6,pz)*funcc(cxI(1)-2:cxI(1)+3,cxI(2)-2:cxI(2)+3,cxI(3)+3)
 
-       if(eveny(j))then
-             tmp1= C1*tmp2(:,1)+C2*tmp2(:,2)+C3*tmp2(:,3)+C4*tmp2(:,4)+C5*tmp2(:,5)+C6*tmp2(:,6)
-       else
-             tmp1= C6*tmp2(:,1)+C5*tmp2(:,2)+C4*tmp2(:,3)+C3*tmp2(:,4)+C2*tmp2(:,5)+C1*tmp2(:,6)
-       endif
+       tmp1= WC(1,py)*tmp2(:,1)+WC(2,py)*tmp2(:,2)+WC(3,py)*tmp2(:,3)+&
+             WC(4,py)*tmp2(:,4)+WC(5,py)*tmp2(:,5)+WC(6,py)*tmp2(:,6)
 
-       if(evenx(i))then
-             funf(i,j,k)= C1*tmp1(1)+C2*tmp1(2)+C3*tmp1(3)+C4*tmp1(4)+C5*tmp1(5)+C6*tmp1(6)
-       else
-             funf(i,j,k)= C6*tmp1(1)+C5*tmp1(2)+C4*tmp1(3)+C3*tmp1(4)+C2*tmp1(5)+C1*tmp1(6)
-       endif
-#endif
+       funf(i,j,k)= WC(1,px)*tmp1(1)+WC(2,px)*tmp1(2)+WC(3,px)*tmp1(3)+&
+                    WC(4,px)*tmp1(4)+WC(5,px)*tmp1(5)+WC(6,px)*tmp1(6)
+#endif
     enddo
    enddo
   enddo