baoshi-was/database/factories/SupplierFactory.php

<?php

/**
 * @var Factory $factory
 */

use App\Supplier;
use Faker\Generator as Faker;
use \Illuminate\Database\Eloquent\Factory;
$factory->define(Supplier::class, function (Faker $faker) {
    return [
        'name' => $faker->userName,
        'contact_man' => $faker->bankAccountNumber,
        'phone' => $faker->phoneNumber,
        'invoice_title' => $faker->jobTitle,
        'bank' => $faker->domainName,
        'bank_account' => $faker->bankAccountNumber,
        'opening_bank' => $faker->address
    ];
});