A couple of days ago we went out together. Long-haul economy class was really exhausting. My flight had no upgrade availability, but my friend's flight had an upgrade option. I asked him why he didn't upgrade, and he said he didn't want to be cheaper than the person next to him. At first, I didn't quite understand, but now I get it. I just saw a computer, and with Xianyu employee discount I could save 1000 yuan; he would earn 1000 yuan. So I chose to buy at the original price. I could save that 1000 yuan, but I just didn't want him to earn that 1000. I can take a loss, but I won't let others take advantage. Is this mentality sick...