Shi dakai, also known as the 'Great Harmony', refers to the vision of a utopian society pursued during the Taiping Rebellion in the mid-19th century in China. This ideal was rooted in a combination of Christian theology and radical social reforms, aiming to create a society free from poverty and inequality. Shi dakai was integral to the rebellion's ideology, influencing major events and battles as Taiping forces sought to establish their vision through military conquests and governance.