Arrange four bidding positions, which are decided by 17 people. Four people in the lucky draw were eliminated first, and then two winners and the remaining 14 people formed the 16 elimination tournament (i.e. 16 entered 8, 8 entered 4, 4 entered 2, and then the final).
Elimination is a form of competition. The loser in every game will be insulated from the champion or the championship, but it doesn't mean that there will be no competition after the loser is eliminated. In some competitions, losers still have to compete for rankings or heritage competitions.