how to use relationship in laravel form label

I want to use the relationship in the Form::label and Form::text, as the Form has been removed from laravel. I use 'Form' => 'Collective\Html\FormFacade' instead.

Here is the relation ship in the Order Model.

<?php namespace App\Models;

use Illuminate\Database\Eloquent\SoftDeletes;
class Order extends \Eloquent
{
    use SoftDeletes;

    public function account_number()
    {
        return $this->belongsTo('\App\Models\Account_number', 'product_id', 'id');
    }
}

And the blade with Form. The account_number td will show {"id":4,"user_id":52,"account_type":"alipay","account_no":"xxxxxx","account_name":"xxxxxx","phone":"xxxxxx","created_at":"2017-11-15 14:43:51","updated_at":"2017-11-15 14:43:51","deleted_at":null}

{!! Form::model($order, array('files' => true)) !!}
<table border="1">
<tr>
  <td>{!! Form::label('out_trade_no', 'out_trade_no: ') !!}</td>
  <td>{!! Form::text('out_trade_no')!!}</td>
</tr>
<tr>
  <td>{!! Form::label('account_number', 'account_number: ') !!}</td>
  <td>{!! Form::text('account_number')!!}</td>
</tr>
</table>

But I want to show account_number each segment seperately, now with a json string.

I have tryed with

<tr>
  <td>{!! Form::label('account_number.id', 'account_number: ') !!}</td>
  <td>{!! Form::text('account_number.id')!!}</td>
</tr>

or

<tr>
  <td>{!! Form::label('account_number->id', 'account_number: ') !!}</td>
  <td>{!! Form::text('account_number->id')!!}</td>
</tr>

But both not works, both leave this td empty.

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