《袁守诚妙算无私曲》

唐太宗年间，长安泾河岸边，渔夫张稍夸口：城里的算命先生袁守诚算得极准，教他天天满载而归。这话惹恼了泾河龙王。龙王变作读书人进城，与袁守诚赌明天下雨的时辰点数，又为赢赌约私改时辰、少下雨量，犯了天条。走投无路，他半夜向唐太宗求救。

"In Chang'an, a fisherman boasts of a fortune-teller so accurate that he never misses a catch, angering the Dragon King of the Jing River. Disguised as a scholar, the king bets on tomorrow's rain, then cheats on the time and the amount — breaking Heaven's law and earning a death sentence. At midnight, only Emperor Taizong can save him."