api/app/Models/BaseModel.php

<?php

namespace App\Models;

use Carbon\Carbon;
use Illuminate\Database\Eloquent\Model;

class BaseModel extends Model
{
    protected function getCreatedAtAttribute($value): string
    {
        return Carbon::parse($value)->setTimezone('Asia/Shanghai')->format('Y-m-d H:i:s');
    }

    protected function getUpdatedAtAttribute($value): string
    {
        return Carbon::parse($value)->setTimezone('Asia/Shanghai')->format('Y-m-d H:i:s');
    }
}