I'm thinking making a quick hop from Taipei to Shenzhen via Hong Kong. I'd get to Hong Kong at around 9:10 and transfer over to a ferry to get to Shekou, and I could pick either 1:45 or 5:15 for the return flight. Is there any possibility I realistically catch the earlier flight back and still have at least an hour to get an early lunch in Shenzhen, or should I just take the later flight?