question about 72 hour visa free transit pass in Shanghai

If I am traveling to Bali and stopping in Shanghai for less than 72 hours, I'm assuming that I am eligible for the free transit pass in Shanghai. I understand that I need to show proof of a flight to my next destination country (Indonesia). However, I was planning on getting a visa on arrival in Indonesia. Will that work or do I have to get my Indonesian tourist entry permit beforehand so that I can show it in Shanghai?