There was a tweet a while back where I guy was riding a train in China and took a photo of the QR code for his seat. He mentioned that you can use the QR code t

There was a tweet a while back where I guy was riding a train in China and took a photo of the QR code for his seat. He mentioned that you can use the QR code to order food and drinks delivered directly to you. About 5 minutes later there was another tweet from him where: - someone saw the original tweet (Guy 2) - scanned the QR code - ordered the OP a drink - added a note to the order saying it was from Guy 2 Always loved this story.