student visa and two entry's?

I have a question,
I have a student visa for China with 1 entry. I apply for another entry to go to Hong Kong.
But in january I fly to the Philippines and I come back on the 21th or 22th of january to Shanghai and flying home to the Netherlands the 24th of january. Even if I have my student X type, can I use the 72 hours transit? Or can I apply for another entry, or do I need to apply for a tourist L in the Philippines to come back?