diff --git a/runtime/engine/common/utils/text_process.cc b/runtime/engine/common/utils/text_process.cc
index bcaffd7ae..f9ade2804 100644
--- a/runtime/engine/common/utils/text_process.cc
+++ b/runtime/engine/common/utils/text_process.cc
@@ -2,7 +2,7 @@
 
 namespace ppspeech {
 
-std::string RemoveBlk(const std::string& str) {
+std::string DelBlank(const std::string& str) {
     std::string out = "";
     int ptr_in = 0;    //  the pointer of input string (for traversal)
     int end = str.size();
@@ -23,7 +23,7 @@ std::string RemoveBlk(const std::string& str) {
     return out;
 }
 
-std::string AddBlk(const std::string& str) {
+std::string AddBlank(const std::string& str) {
     std::string out = "";
     int ptr = 0;  // the pointer of the input string
     int end = str.size();
@@ -44,32 +44,29 @@ std::string AddBlk(const std::string& str) {
     return out;
 }
 
-std::string ReverseFrac(const std::string& str, 
-                        const std::string& left_tag, 
-                        const std::string& right_tag) {
+std::string ReverseFraction(const std::string& str) {
     std::string out = "";
     int ptr = 0;   // the pointer of the input string
     int end = str.size();
     int left, right, frac;  // the start index of the left tag, right tag and '/'.
     left = right = frac = 0;
-    int len_left_tag = left_tag.size();
-    int len_right_tag = right_tag.size();
+    int len_tag = 5;  // length of "<tag>"
 
     while (ptr != end) {
         // find the position of left tag, right tag and '/'. (xxx<tag>num1/num2</tag>)
-        left = str.find(left_tag, ptr);
+        left = str.find("<tag>", ptr);
         if (left == -1)
             break;
         out += str.substr(ptr, left - ptr);  // content before left tag (xxx)
         frac = str.find("/", left);
-        right = str.find(right_tag, frac);
+        right = str.find("<tag>", frac);
         
         out += str.substr(frac + 1, right - frac - 1) + '/' + 
-               str.substr(left + len_left_tag, frac - left - len_left_tag);  // num2/num1
-        ptr = right + len_right_tag;
+               str.substr(left + len_tag, frac - left - len_tag);  // num2/num1
+        ptr = right + len_tag;
     }
     if (ptr != end) {
-        out += str.substr(ptr, end - right - len_right_tag);
+        out += str.substr(ptr, end - ptr);
     }
     return out;
 }
diff --git a/runtime/engine/common/utils/text_process.h b/runtime/engine/common/utils/text_process.h
index e084794a5..9dbc53223 100644
--- a/runtime/engine/common/utils/text_process.h
+++ b/runtime/engine/common/utils/text_process.h
@@ -4,12 +4,10 @@
 
 namespace ppspeech {
 
-std::string RemoveBlk(const std::string& str);
+std::string DelBlank(const std::string& str);
 
-std::string AddBlk(const std::string& str);
+std::string AddBlank(const std::string& str);
 
-std::string ReverseFrac(const std::string& str, 
-                        const std::string& left_tag = "<tag>", 
-                        const std::string& right_tag = "</tag>");
+std::string ReverseFraction(const std::string& str);
 
 }  // namespace ppspeech
\ No newline at end of file
diff --git a/runtime/engine/common/utils/text_process_test.cc b/runtime/engine/common/utils/text_process_test.cc
index 3e36ca0d1..e6da82593 100644
--- a/runtime/engine/common/utils/text_process_test.cc
+++ b/runtime/engine/common/utils/text_process_test.cc
@@ -3,43 +3,45 @@
 #include <gtest/gtest.h>
 #include <gmock/gmock.h>
 
-TEST(TextProcess, RemoveBlkTest) {
+TEST(TextProcess, DelBlankTest) {
     std::string test_str = "我 今天     去 了 超市     花了   120 元。";
-    std::string out_str = ppspeech::RemoveBlk(test_str);
+    std::string out_str = ppspeech::DelBlank(test_str);
     int ret = out_str.compare("我今天去了超市花了120元。");
     EXPECT_EQ(ret, 0);
 
     test_str = "how are you today";
-    out_str = ppspeech::RemoveBlk(test_str);
+    out_str = ppspeech::DelBlank(test_str);
     ret = out_str.compare("how are you today");
     EXPECT_EQ(ret, 0);
 
     test_str = "我 的 paper 在 哪里？";
-    out_str = ppspeech::RemoveBlk(test_str);
+    out_str = ppspeech::DelBlank(test_str);
     ret = out_str.compare("我的paper在哪里？");
     EXPECT_EQ(ret, 0);
 }
 
-TEST(TextProcess, AddBlkTest) {
+TEST(TextProcess, AddBlankTest) {
     std::string test_str = "how are you";
-    std::string out_str = ppspeech::AddBlk(test_str);
+    std::string out_str = ppspeech::AddBlank(test_str);
     int ret = out_str.compare(" how  are  you ");
     EXPECT_EQ(ret, 0);
 
     test_str = "欢迎来到China。";
-    out_str = ppspeech::AddBlk(test_str);
+    out_str = ppspeech::AddBlank(test_str);
     ret = out_str.compare("欢迎来到 China 。");
     EXPECT_EQ(ret, 0);
 }
 
-TEST(TextProcess, ReverseFracTest) {
-    std::string test_str = "<tag>3/1</tag>";
-    std::string out_str = ppspeech::ReverseFrac(test_str);
+TEST(TextProcess, ReverseFractionTest) {
+    std::string test_str = "<tag>3/1<tag>";
+    std::string out_str = ppspeech::ReverseFraction(test_str);
     int ret = out_str.compare("1/3");
+    std::cout<<out_str<<std::endl;
     EXPECT_EQ(ret, 0);
 
-    test_str = "<tag>3/1</tag> <tag>100/10000</tag>";
-    out_str = ppspeech::ReverseFrac(test_str);
+    test_str = "<tag>3/1<tag> <tag>100/10000<tag>";
+    out_str = ppspeech::ReverseFraction(test_str);
     ret = out_str.compare("1/3 10000/100");
+    std::cout<<out_str<<std::endl;
     EXPECT_EQ(ret, 0);
 }
\ No newline at end of file