cxinv/app/admin/model/CgdInfo.php

<?php
declare (strict_types = 1);

namespace app\admin\model;

use think\Model;

/**
 * @mixin \think\Model
 */
class CgdInfo extends Model
{
    public function PayInfo(){
    	return $this->belongsTo(PayInfo::class,"sequenceNo","cgdNo")->bind(["payNo"]);
    }
}