Mao Mao challenged Lakan to a Xiang Qi match, in exchange for him buying a courtesan if Mao Mao wins. Mao Mao prepared 5 cups of liquor, with 3 laced with a dose of poison, where 3 doses would be lethal. Mao Mao was no match for Lakan and lost the first two rounds, thus drank two cups. Lakan, to avoid the potential lethal dose for Mao Mao, threw the third round and drank one glass. He noticed the awful taste of the poison and thus was confident in winning the upcoming rounds. However, he underestimated the potency of the poison, leading him unable to continue the match just from a single cup and thus forfeiting it.