Is there a limit how often 24h twov entry permit can be used?

I used my previous (and first) 24h temporal entry permit in Beijing Dec 9th-10th 2019, now I should do it again on Jan 10th 2020 because I have flight change in Beijing and I need to retrieve my luggage and check in again. Is this ok? Route is Hong Kong - Beijing - Frankfurt.

Extra question considering the previous time: I was supposed to fly Stockholm - Beijing - Guangzhou and exit through landport to Macao. In Stockholm my boarding was denied by Air China staff for not having visa, before I bought a new flight from Beijing to Hong Kong. They said I’m not allowed to do a domestic flight ”because the transit visa will be needed already in Beijing” but your site says multiple stops are allowed. What was the problem?