diff --git a/DOC/source/datasheet/qlsofa_hd/qlsofa_hd_fpga_arch.rst b/DOC/source/datasheet/qlsofa_hd/qlsofa_hd_fpga_arch.rst
index c05e1c7..8c204ed 100644
--- a/DOC/source/datasheet/qlsofa_hd/qlsofa_hd_fpga_arch.rst
+++ b/DOC/source/datasheet/qlsofa_hd/qlsofa_hd_fpga_arch.rst
@@ -46,6 +46,32 @@ The FPGA architecture follows a tile-based organization, to exploit the fine-gra
   |      |          |  cells.                                      |
   +------+----------+----------------------------------------------+
 
+.. _qlsofa_hd_fpga_arch_routing_arch:
+
+Routing Architecture
+^^^^^^^^^^^^^^^^^^^^
+
+The routing architecture shares the same principle as the SOFA HD routing architecture (See details in :ref:`sofa_hd_fpga_arch_routing_arch`).
+
+.. note:: Different from SOFA HD, each routing channel consists of 60 routing tracks. See details in :numref:`table_qlsofa_hd_fpga_arch_routing_track_distribution`.
+
+.. _table_qlsofa_hd_fpga_arch_routing_track_distribution:
+
+.. table:: Routing track distribution of QLSOFA HD FPGA 
+
+  +------------+------------------------------+
+  | Track type | Number of tracks per channel |
+  +============+==============================+
+  | Length-1   | 6  (10%)                     |
+  +------------+------------------------------+
+  | Length-2   | 6  (10%)                     |
+  +------------+------------------------------+
+  | Length-4   | 48 (80%)                     |
+  +------------+------------------------------+
+  | Total      | 60                           |
+  +------------+------------------------------+
+
+
 .. _qlsofa_hd_fpga_arch_scan_chain:
 
 Scan-chain
diff --git a/DOC/source/datasheet/sofa_hd/sofa_hd_fpga_arch.rst b/DOC/source/datasheet/sofa_hd/sofa_hd_fpga_arch.rst
index 26340a9..9854a4a 100644
--- a/DOC/source/datasheet/sofa_hd/sofa_hd_fpga_arch.rst
+++ b/DOC/source/datasheet/sofa_hd/sofa_hd_fpga_arch.rst
@@ -91,18 +91,15 @@ Each routing channel consists of 40 routing tracks. See details in :numref:`tabl
   +------------+------------------------------+
   | Track type | Number of tracks per channel |
   +============+==============================+
-  | Length-1   | 6  (10%)                     |
+  | Length-1   | 4  (10%)                     |
   +------------+------------------------------+
-  | Length-2   | 6  (10%)                     |
+  | Length-2   | 4  (10%)                     |
   +------------+------------------------------+
-  | Length-4   | 28 (80%)                     |
+  | Length-4   | 32 (80%)                     |
   +------------+------------------------------+
   | Total      | 40                           |
   +------------+------------------------------+
 
-
-
-
 .. _sofa_hd_fpga_arch_scan_chain:
 
 Scan-chain