I am from Czech republic, currently in Shanghai on a valid one entry visa.

Hi, I have booked my flight back to Europe from Shanghai, but in menwhile I want to visit Philippines. When flying back from Philippines I plan to arrive from Manila to Shanghai afternoon and after 5 hrs is scheduled my flight to Europe (again from Shanghai). As far as I understand I can use direct transit for this purpose. My questions?
1.do I need to inform airline in Manila about Direct Tranzit in Shanghai (my understanding is not)
2. do I have to pay for that?
3. what will be the procedure upon arrival from Manila? I pickup my luggage, ask for Direct tranzit stamp - go through immigration and then check in the luggage for my next leg to Europe and go through immigration for departure?

I hope I understand it, just want to verify it. Thank you