How does the lottery applet in QQ specify the winner?

Qq has many lottery applets, the basic categories are similar, you can create your own lottery, and there are many ways to play it. You can create a lucky draw according to the number of people, enter the theme, set the participants, and then publish it to the group for lucky draw, but you can't specify the winner, and the system will randomly draw lots to select the winner.

Drawing lots is a folk custom in China, and it is also one of the forms of divination. At present, Taoist temples, temples and folk temples have mostly placed sign boxes for people to draw and ask for directions. Like gossip, drawing lots is a popular forecasting method for ancient people in China to judge good fortune and bad fortune. The basis for judging good or ill luck is the number of poems signed and the allusions of poems signed.