Nagoya - Shanghai - Guangzhou - Sydney

Hello, I'm going to Shanghai from Japan and my final destination is Sydney. The problem is that to go to Sydney I have to make a layover at Guangzhou. So my flight will be something like this: Nagoya - Shanghai - Guangzhou - Sydney. The 144 hour visa will apply in this case? I am just gonna stay in Shanghai 2 days and I'm not planning got out from the airport at Guangzhou.