The Ahan Tongshan Cup (Chinese: 阿含桐山杯; pinyin: Āhán Tóngshān Bēi) is a Chinese Go competition.
The Ahan Tongshan Cup is a Go tournament played with fast time controls: Each player has 30 seconds per move, along with 10 one-minute periods of extra thinking time.
As of 2024, the winner receives 200,000 RMB in prize money.
Both tournaments are sponsored by Agon Shu.
The winners of the two tournaments play against each other in the China-Japan Agon Cup.