diff --git a/XLSW_SONIC/Keil_project/Project.uvoptx b/XLSW_SONIC/Keil_project/Project.uvoptx
index 4277dd1..0bd7bab 100644
--- a/XLSW_SONIC/Keil_project/Project.uvoptx
+++ b/XLSW_SONIC/Keil_project/Project.uvoptx
@@ -606,26 +606,6 @@
     </File>
   </Group>
 
-  <Group>
-    <GroupName>Doc</GroupName>
-    <tvExp>0</tvExp>
-    <tvExpOptDlg>0</tvExpOptDlg>
-    <cbSel>0</cbSel>
-    <RteFlg>0</RteFlg>
-    <File>
-      <GroupNumber>6</GroupNumber>
-      <FileNumber>27</FileNumber>
-      <FileType>5</FileType>
-      <tvExp>0</tvExp>
-      <tvExpOptDlg>0</tvExpOptDlg>
-      <bDave2>0</bDave2>
-      <PathWithFileName>..\readme.txt</PathWithFileName>
-      <FilenameWithoutPath>readme.txt</FilenameWithoutPath>
-      <RteFlg>0</RteFlg>
-      <bShared>0</bShared>
-    </File>
-  </Group>
-
   <Group>
     <GroupName>BSP</GroupName>
     <tvExp>1</tvExp>
@@ -633,8 +613,8 @@
     <cbSel>0</cbSel>
     <RteFlg>0</RteFlg>
     <File>
-      <GroupNumber>7</GroupNumber>
-      <FileNumber>28</FileNumber>
+      <GroupNumber>6</GroupNumber>
+      <FileNumber>27</FileNumber>
       <FileType>1</FileType>
       <tvExp>0</tvExp>
       <tvExpOptDlg>0</tvExpOptDlg>
@@ -645,8 +625,8 @@
       <bShared>0</bShared>
     </File>
     <File>
-      <GroupNumber>7</GroupNumber>
-      <FileNumber>29</FileNumber>
+      <GroupNumber>6</GroupNumber>
+      <FileNumber>28</FileNumber>
       <FileType>1</FileType>
       <tvExp>0</tvExp>
       <tvExpOptDlg>0</tvExpOptDlg>
@@ -657,8 +637,8 @@
       <bShared>0</bShared>
     </File>
     <File>
-      <GroupNumber>7</GroupNumber>
-      <FileNumber>30</FileNumber>
+      <GroupNumber>6</GroupNumber>
+      <FileNumber>29</FileNumber>
       <FileType>1</FileType>
       <tvExp>0</tvExp>
       <tvExpOptDlg>0</tvExpOptDlg>
@@ -677,8 +657,8 @@
     <cbSel>0</cbSel>
     <RteFlg>0</RteFlg>
     <File>
-      <GroupNumber>8</GroupNumber>
-      <FileNumber>31</FileNumber>
+      <GroupNumber>7</GroupNumber>
+      <FileNumber>30</FileNumber>
       <FileType>1</FileType>
       <tvExp>0</tvExp>
       <tvExpOptDlg>0</tvExpOptDlg>
@@ -689,8 +669,8 @@
       <bShared>0</bShared>
     </File>
     <File>
-      <GroupNumber>8</GroupNumber>
-      <FileNumber>32</FileNumber>
+      <GroupNumber>7</GroupNumber>
+      <FileNumber>31</FileNumber>
       <FileType>1</FileType>
       <tvExp>0</tvExp>
       <tvExpOptDlg>0</tvExpOptDlg>
@@ -701,8 +681,8 @@
       <bShared>0</bShared>
     </File>
     <File>
-      <GroupNumber>8</GroupNumber>
-      <FileNumber>33</FileNumber>
+      <GroupNumber>7</GroupNumber>
+      <FileNumber>32</FileNumber>
       <FileType>1</FileType>
       <tvExp>0</tvExp>
       <tvExpOptDlg>0</tvExpOptDlg>
@@ -713,8 +693,8 @@
       <bShared>0</bShared>
     </File>
     <File>
-      <GroupNumber>8</GroupNumber>
-      <FileNumber>34</FileNumber>
+      <GroupNumber>7</GroupNumber>
+      <FileNumber>33</FileNumber>
       <FileType>1</FileType>
       <tvExp>0</tvExp>
       <tvExpOptDlg>0</tvExpOptDlg>
@@ -725,8 +705,8 @@
       <bShared>0</bShared>
     </File>
     <File>
-      <GroupNumber>8</GroupNumber>
-      <FileNumber>35</FileNumber>
+      <GroupNumber>7</GroupNumber>
+      <FileNumber>34</FileNumber>
       <FileType>1</FileType>
       <tvExp>0</tvExp>
       <tvExpOptDlg>0</tvExpOptDlg>
@@ -737,8 +717,8 @@
       <bShared>0</bShared>
     </File>
     <File>
-      <GroupNumber>8</GroupNumber>
-      <FileNumber>36</FileNumber>
+      <GroupNumber>7</GroupNumber>
+      <FileNumber>35</FileNumber>
       <FileType>1</FileType>
       <tvExp>0</tvExp>
       <tvExpOptDlg>0</tvExpOptDlg>
@@ -749,8 +729,8 @@
       <bShared>0</bShared>
     </File>
     <File>
-      <GroupNumber>8</GroupNumber>
-      <FileNumber>37</FileNumber>
+      <GroupNumber>7</GroupNumber>
+      <FileNumber>36</FileNumber>
       <FileType>1</FileType>
       <tvExp>0</tvExp>
       <tvExpOptDlg>0</tvExpOptDlg>
@@ -769,8 +749,8 @@
     <cbSel>0</cbSel>
     <RteFlg>0</RteFlg>
     <File>
-      <GroupNumber>9</GroupNumber>
-      <FileNumber>38</FileNumber>
+      <GroupNumber>8</GroupNumber>
+      <FileNumber>37</FileNumber>
       <FileType>1</FileType>
       <tvExp>1</tvExp>
       <tvExpOptDlg>0</tvExpOptDlg>
diff --git a/XLSW_SONIC/Keil_project/Project.uvprojx b/XLSW_SONIC/Keil_project/Project.uvprojx
index 8220df3..cf192fc 100644
--- a/XLSW_SONIC/Keil_project/Project.uvprojx
+++ b/XLSW_SONIC/Keil_project/Project.uvprojx
@@ -535,16 +535,6 @@
             </File>
           </Files>
         </Group>
-        <Group>
-          <GroupName>Doc</GroupName>
-          <Files>
-            <File>
-              <FileName>readme.txt</FileName>
-              <FileType>5</FileType>
-              <FilePath>..\readme.txt</FilePath>
-            </File>
-          </Files>
-        </Group>
         <Group>
           <GroupName>BSP</GroupName>
           <Files>
diff --git a/XLSW_SONIC/readme.txt b/XLSW_SONIC/readme.txt
deleted file mode 100644
index a93e1d1..0000000
--- a/XLSW_SONIC/readme.txt
+++ /dev/null
@@ -1,36 +0,0 @@
-/*!
-    \file    readme.txt
-    \brief   description of led spark with systick, USART print and key example
-    
-    \version 2023-02-27, V1.2.0, firmware for GD32E23x
-*/
-
-/*
-    Copyright (c) 2023, GigaDevice Semiconductor Inc.
-
-    Redistribution and use in source and binary forms, with or without modification, 
-are permitted provided that the following conditions are met:
-
-    1. Redistributions of source code must retain the above copyright notice, this 
-       list of conditions and the following disclaimer.
-    2. Redistributions in binary form must reproduce the above copyright notice, 
-       this list of conditions and the following disclaimer in the documentation 
-       and/or other materials provided with the distribution.
-    3. Neither the name of the copyright holder nor the names of its contributors 
-       may be used to endorse or promote products derived from this software without 
-       specific prior written permission.
-
-    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 
-AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 
-WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 
-IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 
-INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 
-NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 
-PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 
-WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 
-ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 
-OF SUCH DAMAGE.
-*/
-
-  This example is based on the GD32E230C-EVAL-V1.1 board, it provides a
-description of SysTick configuration, use of EVAL_COM and key.