This entrance slip, formally "Statement of Travel Records", shows the entry port as "Shenzhen West Kowloon". This statement has the same effect as the China Immigration exit-entry stamp.
<a href="//commons.wikimedia.org/wiki/User:N509FZ" title="User:N509FZ">N509FZ</a>, Entrance slip issued by China Immigration Inspection Shenzhen General Station
CC BY-SA 4.0
<span class="int-own-work" lang="en">Own work</span>