diff --git a/README.md b/README.md
index c57df85502e4382262d9f654492ac9eec0590992..d39b2d4af631b1663e3ed2816d9e4585022b00a2 100755
--- a/README.md
+++ b/README.md
@@ -528,7 +528,7 @@ var result = pro.entries();
 import util from '@ohos.util'
 var pro = new util.LruBuffer();
 pro.put(2,10);
-var result = aa[symbol.iterator]();
+var result = pro[symbol.iterator]();
 ```
 50.afterRemoval() 
 ```
diff --git a/README_zh.md b/README_zh.md
index 3f2d966b53fbbcfd37af76ce60719e8f86bb4633..a60319233717897cbec90fdc1ae1a2e7e9bf7961 100644
--- a/README_zh.md
+++ b/README_zh.md
@@ -529,7 +529,7 @@ var result = pro.entries();
 import util from '@ohos.util'
 var pro = new util.LruBuffer();
 pro.put(2,10);
-var result = aa[symbol.iterator]();
+var result = pro[symbol.iterator]();
 ```
 50.afterRemoval()  
 ```
diff --git a/util/build_ts_js.py b/util/build_ts_js.py
index e9762124152b0e833b30b083caedf2026eb29db7..cb4d8eba0f61dd5f29b8c6e6a250916b5f41b843 100755
--- a/util/build_ts_js.py
+++ b/util/build_ts_js.py
@@ -17,33 +17,39 @@ import platform
 import argparse
 import subprocess
 
-def run_command(cmd):
-    print(" ".join(cmd))
-    proc = subprocess.Popen(cmd, stdout=subprocess.PIPE,
-          stderr=subprocess.PIPE, universal_newlines=True)
-    out, err = proc.communicate()
-    if out != "":
-        print(out)
+def run_command(in_cmd):
+    print(" ".join(in_cmd))
+    proc = subprocess.Popen(in_cmd, stdout=subprocess.PIPE,
+                          stderr=subprocess.PIPE,
+                          universal_newlines=True,
+                          shell=False)
+    stdout, stderr = proc.communicate()
+    if stdout != "":
+        print(stdout)
         exit(1)
 
+
 if __name__ == '__main__':
-    
-    build_path = os.path.abspath(os.path.join(os.getcwd(), "../.."))
-    os.chdir("%s/base/compileruntime/js_util_module/util" % build_path)
 
-    parser = argparse.ArgumentParser()
-    parser.add_argument('--dst-file',
+    BUILD_PATH = os.path.abspath(os.path.join(os.getcwd(), "../.."))
+    os.chdir("%s/base/compileruntime/js_util_module/util" % BUILD_PATH)
+
+    PARSER_INST = argparse.ArgumentParser()
+    PARSER_INST.add_argument('--dst-file',
                         help='the converted target file')
-    input_arguments = parser.parse_args()
+    INPUT_ARGUMENTS = PARSER_INST.parse_args()
+
 
-    node = '../../../../prebuilts/build-tools/common/nodejs/\
+    NODE_PATH = '../../../../prebuilts/build-tools/common/nodejs/\
 node-v12.18.4-linux-x64/bin/node'
-    tsc = '../../../../ark/ts2abc/ts2panda/node_modules/typescript/bin/tsc'
-    cmd = [node, tsc]
-    run_command(cmd)
+    TSC_PATH = '../../../../ark/ts2abc/ts2panda/node_modules/\
+typescript/bin/tsc'
+    CMD_INST = [NODE_PATH, TSC_PATH]
+    run_command(CMD_INST)
 
-    cmd = ['cp', "-r", './out/util_js.js', input_arguments.dst_file]
-    run_command(cmd)
+    CMD_INST = ['cp', "-r", './out/util_js.js', INPUT_ARGUMENTS.dst_file]
+    run_command(CMD_INST)
 
-    cmd = ['rm', "-rf", './out']
-    run_command(cmd)
\ No newline at end of file
+    CMD_INST = ['rm', "-rf", './out']
+    run_command(CMD_INST)
+    exit(0)