Help design the 20-player elimination system

20-person knockout, the first round 12 people bye-bye, numbered A-L respectively, and the first round of 8-person lottery, numbered M-T.

The first round:

( 1)M-N

(2) Operating procedures

(3)Q-R

(4) Science and technology

Second round

(5) A -( 1) winner

(6) Britain-China

(7) Design Engineer

8) F-2) Winner

(9)G-(3) Winner

( 10)H-I

( 1 1)J-K

(12)L-(3) winner

Third round (quarter-final)

(13)(5) Winner -(6) Winner

(14)(7) Winner -(8) Winner

(15)(9) Winner -( 10) Winner

(16)( 1 1) Winner -( 12) Winner

17-20 qualified

(17)( 1) negative -(2) negative

(18)(3) negative -(4) negative

9- 16 qualifying

(19)(5) negative -(6) negative

failure

(2 1)(9) negative -( 10) negative

(22)( 1 1) negative -( 12) negative

13- 16 qualification

(23)( 19) loser-(20) loser

(24)(2 1) negative -(22) negative

9- 12 qualifying

(25)( 19) Winner -(20) Winner

(26)(2 1) Winner -(22) Winner

5-8 qualifying matches

(27)( 13) loser-(14) loser

(28)( 15) loser-(16) loser

semifinal

(29)( 13) Winner -( 14) Winner

(30)( 15) Winner -( 16) Winner

Strive for the first place 19

(3 1)( 17) negative -( 18) negative

Fight for the first place 17.

(32)( 17) Winner -( 18) Winner

Strive for the first place 15

Loser, loser

Strive for 13.

(34)(23) Winner -(24) Winner

Fight for 1 1.

Losers -(26) Losers

Fight for the ninth place

(36)(25) Winner -(26) Winner

Fight for seventh place

Loser, loser

Fight for the fifth place

(38)(27) Winner -(28) Winner

Fight for the third place

Loser, loser

final

(40)(29) Winner-(30) Winner

***40 games