Fetch live data from database laravel

I'm trying to fetch data live from database using javascript and Laravel, but I'm getting an error "syntax error, unexpected '<'"in blade file. I was following this and now I'm stuck. How can I fetch live data from database?

Blade View

<span id="mycount">
@if( > 0)
   <h1>Hello/h1>
@else
@endif
</span>

jQuery

$.ajax({
type: "GET",
url: "",
success: function(data) {
    $('#mycount').html(data);
   setTimeout(getCount, 1000);
}
});

Controller

  public function getCount(){
{
    echo ProductReview::where('product_id',$this->id)->avg('rating');
}
}

via Chebli Mohamed