diff --git a/Base62x.class.js b/Base62x.class.js
index 7c56da3..9d4cb64 100644
--- a/Base62x.class.js
+++ b/Base62x.class.js
@@ -227,6 +227,7 @@
                     }
                     else{
                         console.log('static decode: illegal base62x input:['+inputArr[i]+']. 1702122106.');
+                        i++;
                         continue;
                     }
 					m++;
diff --git a/Base62x.class.jsp b/Base62x.class.jsp
index 3f3cdd7..497d14a 100644
--- a/Base62x.class.jsp
+++ b/Base62x.class.jsp
@@ -282,6 +282,7 @@ public static final class Base62x{
 					}
 					else{ //- == 1
 						System.out.println("Base62x.decode: illegal base62x input:["+input+"]. 1608091042.");
+                        i++;
 						continue;
 					}
 					m++;
diff --git a/Base62x.class.php b/Base62x.class.php
index 101ac23..ddeff0b 100644
--- a/Base62x.class.php
+++ b/Base62x.class.php
@@ -247,6 +247,7 @@ public static function decode($input, $obase=null){
                     }
                     else{
 						error_log(__FILE__.": found illegal base62x input:[".$inputArr[$i]."]. 1608091042.");
+                        $i++;
                         continue;
                     }
                     $m++;
diff --git a/Base62x.pm b/Base62x.pm
index f12f91b..cee8719 100644
--- a/Base62x.pm
+++ b/Base62x.pm
@@ -266,6 +266,7 @@ sub decode($ $){
                 }
                 elsif($remaini == 1){
                     print($LOGTAG.": found illegal base62x input:[".$inputArr[$i]."]. 1608091042.");
+                    $i++;
                     next;
                 } 
                 $m++;
diff --git a/Base62x.py b/Base62x.py
index 3031b0a..1423131 100644
--- a/Base62x.py
+++ b/Base62x.py
@@ -307,6 +307,7 @@ def decode(self, encstr, obase=0):
                     elif remaini == 1:
                         print("{} found illegal input:[{}]. 1903091005. i:[{}]".format(
                             self.LogTag, inputArr[i], i))
+                        i += 1
                         continue
 
                     m += 1
diff --git a/base62x b/base62x
index 60683aa..3c2e920 100755
Binary files a/base62x and b/base62x differ
diff --git a/base62x.c b/base62x.c
index ed82358..399181c 100644
--- a/base62x.c
+++ b/base62x.c
@@ -316,6 +316,7 @@ int main(int argc, char *argv[]){
                 }
                 else{
 					printf("Base62x.decode: found illegal base62x input:[%s]! 1612121816.\n", input);
+                    i++;
                     continue;
                 } 
 				m++; //- deprecated.
diff --git a/test4IssueFromHahaapi.php b/test4IssueFromHahaapi.php
new file mode 100644
index 0000000..8ed7e69
--- /dev/null
+++ b/test4IssueFromHahaapi.php
@@ -0,0 +1,16 @@
+<?php
+
+include("./Base62x.class.php");
+
+
+$s = "中文测试";
+
+print "enc: ".($senc=Base62x::encode($s))."\n";
+print "dec-$senc: ".Base62x::decode($senc)."\n";
+print "dec-vBYjvfQ7vhMBwAx2: ".Base62x::decode("vBYjvfQ7vhMBwAx2")."\n";
+print "dec-vBYjvfQ7vhMBwAx: ".Base62x::decode("vBYjvfQ7vhMBwAx")."\n";
+print "dec-vBYjvfQ7vhMBwA: ".Base62x::decode("vBYjvfQ7vhMBwA")."\n";
+print "dec-vBYjvfQ7vhMBw: ".Base62x::decode("vBYjvfQ7vhMBw")."\n";
+print "dec-vBYjvfQ7vhMB: ".Base62x::decode("vBYjvfQ7vhMB")."\n";
+
+?>