In the casinos of Macau, apart from Texas Hold'em, most games are about betting on high or low and guessing numbers, or it's just slot machines. You can bet on high or low at any time; there's really no need to bet here, but people from all over the world come here to play a bit with 50, 500, or 5000 bucks on banker or player, blackjack, or betting high or low. A large area is just one game; it’s just a matter of which table has more people and which has fewer, there’s really no difference. Passersby either watch the excitement, some think the dealer is a woman, and others look to see who is lucky. Feng Wuxiang chose to play the slot machines because his mother-in-law once won hundreds of thousands of Singapore dollars in Singapore. So we exchanged 10,000 bucks in chips to play the slots, picking for a while, looking at the gameplay, where the crowds were, and which game had a bigger jackpot. The slot machine started. We charged 2000 bucks each time, and the balance in the slot machine fluctuated no more than 3900, for example: 2000 → 3000 → 3900 → 3000 → 1000 → 2500 → 2900 → 1000 → 0. After losing three 2000 bucks, since we had already played for an hour, Feng Wuxiang suggested we keep playing, and he went to find a "go-go girl." We continued playing for about 40 minutes, and by the time he returned, we only had 3900 bucks left. He suggested going all in and let him play. Sure enough, switching players made a difference; in no time, he hit a small jackpot, and the balance reached 19000. After playing for another half hour, we were down to 13000. I suggested we stop playing, take out the 3000 bucks we won, and if we passed three rounds, it would be 24000, with each person getting 8000 bucks. Everyone agreed, and we found a machine that looked good and bet small three times in a row. Sure enough, we won 24000 and happily exchanged chips to go home. Many people refer to the money "won" from gambling as "earned." Although it can be understood in any way, I think this is exactly what the concept of "volatility" expresses: An upward fluctuation is profit, a downward fluctuation is loss. Being unemployed and unable to find a job is volatility; Buying gold that rises and falls is volatility;...