diff --git a/docs/.vuepress/config.js b/docs/.vuepress/config.js
index acf8cda..2c1e751 100755
--- a/docs/.vuepress/config.js
+++ b/docs/.vuepress/config.js
@@ -96,10 +96,6 @@ module.exports = {
       {
         text: '关于',
         items: [
-            {
-                text: '项目概况',
-                link: '/about/index.html',
-            },
             {
                 text: '泛在操作系统研究计划',
                 link: '/about/xuos.html',
@@ -167,7 +163,6 @@ module.exports = {
         }
       ],
       '/about/': [
-        ['','项目概况'],
         ['xuos','泛在操作系统研究计划'],
         ['contact','联系方式'],
         ['license','开源许可']
diff --git a/docs/about/xuos.md b/docs/about/xuos.md
index 17d5ed8..35aa079 100644
--- a/docs/about/xuos.md
+++ b/docs/about/xuos.md
@@ -51,10 +51,11 @@
 <a id='ref_mw'></a>
 [1] Mark Weiser, "The Computer for the 21st Century", Scientific Am., vol. 265, no. 3, 1991, pp. 94–105.
 
-<a id='ref_hy18'/>
+<a id='ref_hy18'></a>
 [2] Hong Mei, Yao Guo, "Toward Ubiquitous Operating Systems: A Software-Defined Perspective", IEEE Computer, Vol. 51, No. 1, pp. 50-56, January 2018. 
 
-<a id='ref_hy18_2'/>
+
+<a id='ref_hy18_2'></a>
 [3] Hong Mei, Yao Guo, "Operating Systems for Internetware: Challenges and Future Directions", ICDCS 2018, July 2018.