phpstock/app/admin/model/SaleOriginChange.php

<?php
declare (strict_types = 1);

namespace app\admin\model;

use think\Model;

/**
 * @mixin \think\Model
 */
class SaleOriginChange extends Model
{
    protected $createTime="addtime";
    
    public function orderInfo(){
    	return $this->belongsTo(Sale::class,"orderCode","orderCode");
    }
}