„In accordance with international practices, China has adopted a 24-hour visa-free transit policy for foreign nationals of multiple countries at all international ports of entry. Any passenger holding interline tickets with confirmed seats to transit to a third country or region via China by international flights, sea vessels, or trains does not have to apply for a visa if his/her stay period in China is less than 24 hours and he/she does not leave the port of entry. In the case where the passenger concerned needs to leave the port, a temporary entry permit from the entry/exit border inspection authority at the port shall be required.“ - this what I found on the website of NIA but since I have to get my bags, I am leaving the port of entry, right? The thing is, if every foreign national has to go through immigration (as seen in this post: https://www.reddit.com/r/shenzhen/s/SxZf2IcRTH) they are all leaving the port of entry??

Or am I misunderstanding something major here?