Then they try to guess the total number of fingers held out between them by using phrases referring to incidents from the Romance of the Three Kingdoms that involve numbers, such as "the three invitations to Chu-ko Liang" or "the seven captures of Meng Huo." People who aren't well versed in Chinese literature can't hack it.
然後再以三國演義中的數字成語如「單」刀赴會，「三」請孔明，「七」擒孟獲……，喊猜兩人指數之合；「國學程度」不夠的人，就沒辦法過招了。