The title of this novel was "Poison Doctor Princess Consort, No Escape". The female lead was Yang Wanru, and the male lead was King Jing. When the female protagonist and the male protagonist were young, the female protagonist mistakenly listened to the words of her eldest sister and pushed the male protagonist into the water, causing his life to be in danger. The male protagonist later vowed to get revenge, and the gears of their fates unfolded. The male protagonist, King Jing, also owned a tea house. The female protagonist was a famous poison doctor in Jianghu. She had a love-hate relationship with King Jing. I hope you like my recommendation. Muah ~