zhuishuyun_quickapp/app/Modules/Book/Models/FreeBook.php

<?php

namespace App\Modules\Book\Models;

use Illuminate\Database\Eloquent\Model;

class FreeBook extends Model
{
    protected $table = 'free_books';
    protected $fillable = [
        'bid',
        'book_name',
        'sex',
        'virtual_fee',
        'charge_amount',
        'is_enabled',
        'start_time',
        'end_time',
    ];
}