You draw yours, and at the same time, the league will arrange a strength list for the rookie of the year (the league is only judging, there are mistakes) for the reference of the draft team, but the person who is not the first in the strength list must exchange him with the champion, and the champion depends on who the champion team chooses first.
In 2002, the Rockets had the No.1 pick, and they took a fancy to 227CM Yao Ming at first sight, so Yao Ming became the first No.1 pick from Asia.
To add a few points, the second contestant is called "No.2" and the third contestant is called "Flower Exploration". There are two rounds of draft every year, and the rookie in the first round is usually better than the rookie in the second round.