return if content dont contain Chinese and result don't contain special Pinyin character (e.g. yes3)

lib/DDG/Goodie/ChineseToPinyin.pm

@@ -97,6 +97,14 @@ handle remainder_lc => sub {
     my $result = $h2p->han2pinyin($spacedChineseString);
     $result = ConvertTone($result);
     
+    # if content dont contain Chinese
+    if(!(/[\p{Han}]/)){
+        # and result don't contain special Pinyin character
+        if ($result !~ m/[āáǎàēéěèīíǐìōóǒòūúǔùǜǘǚǜ]/) {
+            return;
+        }
+    }
+    
     return "Pinyin of $_ is \"$result\"",
         structured_answer => {
         data => {

t/ChineseToPinyin.t

@@ -54,6 +54,7 @@ ddg_goodie_test(
     # Try to include some examples of queries on which it might
     # appear that your answer will trigger, but does not.
     'pinyin ' => undef,
+    'pinyin yes3' => undef,
     'pinyin how are you?' => undef,
     'pinyin zhōng guó' => undef,
 );