How to decide the championship season after the semi-finals of Go?

If the tournament system is adopted in the Go game, the upper and lower halves are usually decided by drawing lots before the game starts, so the top four, top eight and top two are decided in advance by the upper and lower halves. The two winners are champions, the first winner is the runner-up and the first loser is the third runner-up. Other common competition systems include single-loss elimination system (similar to the championship where the third place is not decided), double-loss elimination system, round robin and so on. If the tournament system is adopted in the Go game, the upper and lower halves are usually decided by drawing lots before the game starts, so the top four, top eight and top two are decided in advance by the upper and lower halves. The two winners are champions, the first winner is the runner-up and the first loser is the third runner-up. Other common competition systems include single-loss elimination system (similar to the championship where the third place is not decided), double-loss elimination system, round robin and so on.