Wide character in print at hcp.pl line 21.

jrhmpt01:/root# cat -n hcp.pl 
     1	use LWP::UserAgent;  
     2	use Encode;
     3	 $ua = LWP::UserAgent->new;  
     4	 @header = (  
     5	    'accept'=> "application/json",  
     6	    'content-type'=> "application/json",  
     7	    'apix-key'=> "e7b00871640c49567a37566ccd5c27e9",  
     8	    'User-Agent' => "Mozilla/8.0"  
     9	    );  
    10	  
    11	$start = $ARGV[0];  
    12	$end = $ARGV[1];  
    13	$date = $ARGV[2];  
    14	$host="http://a.apix.cn/apixlife/ticket/rest?from=$start&to=$end&date=$date";  
    15	$request = HTTP::Request->new(GET=>"$host");  
    16	$request->header(@header);  
    17	  
    18	$response = $ua->request($request);   
    19	$content= $response->decoded_content;  
    20	$content =~ s/\u([0-9a-fA-F]{4})/pack("U",,hex($1))/eg;   
    21	print $content."
";;  
    22	print "-----------------------
";
    23	print encode_utf8($content);
    24	print "
";
jrhmpt01:/root# perl hcp.pl BJP TJP 2015-12-11 
Wide character in print at hcp.pl line 21.
{"status": true, "validateMessagesShowId": "_validatorMessage", "messages": [], "httpstatus": 200, "validateMessages": {}, "data": {"message": "没有符合条件的数据！", "flag": false}}
-----------------------
{"status": true, "validateMessagesShowId": "_validatorMessage", "messages": [], "httpstatus": 200, "validateMessages": {}, "data": {"message": "没有符合条件的数据！", "flag": false}}