留门 meaning in English

leave a door unlocked [unbolted]

Come on up . i ' ll leave the door open
上来，我会给你留门的
All visitors and / or their vehicles must truthfully fill in " the registration book of visiting personnel ' s entry ” and “ the registration book of visiting personnel ' s vehicle entry into the company books . " , and temporarily leave their valid identity documents to the security guards
二、所有外来人员及车辆必须如实填写“外来人员入厂登记簿”和“外来车辆入厂登记簿” ，并将有效身份证件暂留门卫。