72 hrs visa Shanghai - Hangzhou - Malaysia

Hey everyone, I'm a German citizen and will fly to Shanghai. 30 hours later I'm planning to fly from Hangzhou to Malaysia (no adequate flight from SH).
Although Zhejiang province is mentioned with regard to the 144 hrs free transit I'm not sure if this regulation also applies for less than 144 = 72 hrs. This would be logical, but the consulate here couldn't tell me (not in charge) and I'd like to make sure.
Any experiences?
Thanks,
Frieda