Tang Ziyi's historical prototype is actually Zhang Zuo Lin. When Zhang was young, he used to beg in the streets and work as a handyman in a coach shop in Gaokan Town, Yingkou, Liaoning Province. Sometimes mules and horses get sick, so he gets some herbs to cure them, and they are really cured. He was very clever. After a while, he became a veterinarian.
In the play, Tang Ziyi was also hit by the enemy into the water, but he survived and came to the town, where he was taken in by the veterinarian Liu. Liu Wuzi, a veterinarian, accepted Tang Ziyi as a disciple and later betrothed his daughter to him. In order to make veterinarian Liu's business prosperous, Tang Ziyi gave croton to the animals parked in the ox cart shop, and was almost expelled from his old school.