diff --git a/libchinese-segmentation b/libchinese-segmentation
index 124c661..bf085a4 160000
--- a/libchinese-segmentation
+++ b/libchinese-segmentation
@@ -1 +1 @@
-Subproject commit 124c661581e0f2e10a47d3cc237f7ade404f1bec
+Subproject commit bf085a4a188010fac212e0f80e133c777857552b
diff --git a/libsearch/index/file-content-indexer.cpp b/libsearch/index/file-content-indexer.cpp
index ee488a4..5112459 100644
--- a/libsearch/index/file-content-indexer.cpp
+++ b/libsearch/index/file-content-indexer.cpp
@@ -41,9 +41,8 @@ bool fileContentIndexer::index()
     }
 
     m_document.setData(content);
-    //'\xEF\xBC\x8C' is "，" "\xE3\x80\x82" is "。"  use three " " to replace ,to ensure the offset info.
-    content = content.replace("\t", " ").replace("\xEF\xBC\x8C", "   ").replace("\xE3\x80\x82", "   ");
-    std::vector<KeyWord> term = ChineseSegmentation::getInstance()->callSegment(content.left(20480000).toStdString());
+
+    std::vector<KeyWord> term = ChineseSegmentation::getInstance()->callSegment(content.left(20480000));
     content.clear();
     content.squeeze();
 
diff --git a/libsearch/index/search-manager.cpp b/libsearch/index/search-manager.cpp
index dd3aff9..e6aa032 100644
--- a/libsearch/index/search-manager.cpp
+++ b/libsearch/index/search-manager.cpp
@@ -274,7 +274,7 @@ int FileContentSearch::keywordSearchContent() {
         qp.set_default_op(Xapian::Query::OP_AND);
         qp.set_database(db);
 
-        std::vector<KeyWord> sKeyWord = ChineseSegmentation::getInstance()->callSegment(m_keyword.toStdString());
+        std::vector<KeyWord> sKeyWord = ChineseSegmentation::getInstance()->callSegment(m_keyword);
         //Creat a query
         std::string words;
         for(size_t i = 0; i < sKeyWord.size(); i++) {
@@ -414,7 +414,7 @@ int OcrSearch::keywordSearchOcr() {
         Xapian::QueryParser qp;
         qp.set_default_op(Xapian::Query::OP_AND);
         qp.set_database(db);
-        std::vector<KeyWord> sKeyWord = ChineseSegmentation::getInstance()->callSegment(m_keyword.toStdString());
+        std::vector<KeyWord> sKeyWord = ChineseSegmentation::getInstance()->callSegment(m_keyword);
         //Creat a query
         std::string words;
         for(int i = 0; i < sKeyWord.size(); i++) {
diff --git a/libsearch/notesearch/note-search-plugin.cpp b/libsearch/notesearch/note-search-plugin.cpp
index 274441b..916d61e 100644
--- a/libsearch/notesearch/note-search-plugin.cpp
+++ b/libsearch/notesearch/note-search-plugin.cpp
@@ -180,7 +180,7 @@ NoteSearch::NoteSearch(DataQueue<SearchPluginIface::ResultInfo> *searchResult, c
 }
 
 void NoteSearch::run() {
-    std::vector<KeyWord> sKeyWordVec = ChineseSegmentation::getInstance()->callSegment(m_keyword.toStdString());
+    std::vector<KeyWord> sKeyWordVec = ChineseSegmentation::getInstance()->callSegment(m_keyword);
     QStringList keywordList;
     for (KeyWord sKeyWord : sKeyWordVec) {
         keywordList.append(QString::fromStdString(sKeyWord.word));
diff --git a/libsearch/searchinterface/searchtasks/file-content-search-task.cpp b/libsearch/searchinterface/searchtasks/file-content-search-task.cpp
index c447e62..814907f 100644
--- a/libsearch/searchinterface/searchtasks/file-content-search-task.cpp
+++ b/libsearch/searchinterface/searchtasks/file-content-search-task.cpp
@@ -179,8 +179,8 @@ inline Xapian::Query FileContentSearchWorker::createQuery()
 {
     std::vector<Xapian::Query> v;
 
-    for (const auto &keyword : m_searchController->getKeyword()) {
-        std::vector<KeyWord> sKeyWord = ChineseSegmentation::getInstance()->callSegment(keyword.toStdString());
+    for (auto &keyword : m_searchController->getKeyword()) {
+        std::vector<KeyWord> sKeyWord = ChineseSegmentation::getInstance()->callSegment(keyword);
 
         for(const auto & c : sKeyWord) {
             v.emplace_back(c.word);