Liu Tang was the first person to hear about the convoy of birthday gifts for Cai Jing, which was being escorted by Yang Zhi and his soldiers. He rushed off immediately to tell his friend, Chao Gai, but got too drunk on the way and fell asleep inside a temple. The constable Lei Heng arrested Liu Tang, mistaking him for a wanted bandit. Luckily, Chao Gai lied to Lei Heng that Liu Tang was his nephew, asking for Liu Tang's release. Lei Heng kindly obliged.