Liars usually let you win the first prize. After buying the discounted jewelry and jade, they will replace the lottery ticket that didn't win with your winning again, creating the feeling that the first prize is "lucky and not easy". These discounted jewels are generally inferior. Merchants bid a high price in advance, and then let you buy these inferior jewels at a price N times higher than the purchase price after the discount, so as to reap huge profits. Therefore, when passing through the service area, you must pay attention to any such thing as buying lottery tickets. Just look at it. Don't invest your own money. Shopkeepers can write the price tag of their products at will, or even write millions. This is normal. Remember that there is no free lunch.