PHP form - How to sent email that contain UTF-8 character

Question

I am continuing to developing a web from previous developer that allow user to sent query form. Some of the user is Chinese therefore they tend to use Chinese character when they fill the form. When they sent the form,the email I receive will show this

å ‰éš†å ¡/雪兰莪州

Is there anyway to solve this problem? Here is the code

query_process.php:

<?php
session_start();

require_once "includes/phpmailer.php";


$name = mysql_real_escape_string($_POST['name']);
$email = mysql_real_escape_string($_POST['email']);
$subject = mysql_real_escape_string($_POST['subject']);
$message = mysql_real_escape_string($_POST['message']);


$subject = "[Website] Contact Form";
$body = "<p>Name: $name</p>
         <p>Email: $email</p>
         <p>Subject: $subject</p>
         <p>Message : $message</p>
        ";
        //$cf_mail_replyto
if(sendPHPMail('___', '___', '___', $subject, $body))
    echo "success";
else
    echo "fail";
?>

query_from.php:

...
function submitForm()
{
    if($("#name").val() == "")
        alert("Sorry, please fill in your name.");
        else
            if($("#email").val() == "")
        alert("Sorry, please fill in your email.");
        else
            if($("#subject").val() == "")
        alert("Sorry, please fill in your subject.");
        else
            if($("#message").val() == "")
        alert("Sorry, please fill in your message.");
    else
    {
        $.ajax({
            type: "POST",
            url: "query_process.php",
            data: $("#enquiry").serialize(),
            success: function(data){
                if(data == "success"){
                    alert("Your enquiry has been sent successfully.");
                window.location.reload();
                }
                else{
                    //console.log(data);
                    //alert(data);
                alert("There's problem sending your enquiry. Please try again later.");
                }
            }
        });
    }
}
...
</script>
//my form
...

Answer 1

1. don't use the mysql extension any more
2. why on earth are you using mysql_real_escape_string in an email context
3. what email viewer are you using
4. what exactly is in the sendPHPMail function? Is that a wrapper for the phpmailer class? Check Cant send email with correct characters with PHPMailer on how to send UTF-8 mail with phpmailer .
5. Does the HTML page containing the form have the appropriate UTF-8 encoding?