IPhone : getting Chinese data as UTF8 from web service

I am tryig to access a url which is returning some data which has chinese characters. It returns following response in browser:

{"news":"新聞發佈"}

But when I am trying to read it in my objective c code I am getting nil in nsdata. Following is my objective c code:

NSString *final_url = [NSString stringWithFormat:@"http://xx.xxx.xx.xx:xxxx/iph1/NewsAction.do?service=NEWSNOTIF&lang=2&uid=xxxxxxx"];

final_url = [final_url stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];

NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:[NSURL URLWithString:final_url] cachePolicy:NSURLRequestReloadIgnoringLocalCacheData timeoutInterval:60.0];

NSURLResponse *response;
NSError *error = [[NSError alloc] init];

NSData *data = [NSURLConnection sendSynchronousRequest:request returningResponse:&response error:&error];

NSString *strResponse = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];

NSData *objectData = [strResponse dataUsingEncoding:NSUTF8StringEncoding];
NSDictionary *json = [NSJSONSerialization JSONObjectWithData:objectData
                                                     options:NSJSONReadingMutableContainers
                                                       error:&error];
NSLog(@"json %@",json);

Can someone please help me?

Thanks in advance

Pankaj