The Chunlan Cup, officially the Chunlan Cup World Professional Weiqi Championship (Chinese: 春兰杯世界职业围棋锦标赛), is an international Go competition.
The Chunlan Cup is an international Go tournament sponsored and hosted by the Chunlan Group of China.
The top 8 players are qualified for the next round while the bottom 8 play each other in a knockout tournament.
Each player has 2 hours and 30 minutes of time with five 60-second byoyomi periods, since the 12th cup.
[1] (Formerly, the time limit was 3 hours with five 60-second byoyomi periods.