2. Weigh, he will put another bag when bagging. The purpose of this is afraid that if the weighing is fair (fair weighing means free in the market), it depends on whether the black bag is dry when weighing. After weighing, ask one person to run to the fair weighing and weigh as much as possible. (Last time I weighed it, it was 2.4 kg, but when I got the fair scale, it was only 1.8 kg, and finally I gave it to him 1.8 kg. )
3. If you buy fresh fish, throw the fish to death after weighing and let others do it (to prevent the copied person from replacing it with a dead one, and there is no need to change it if it falls to death).
Just pay attention to the above three points, others are minor problems.
Attached are some photos of the last meal, hehe