Why did Wang dress up as a little wife?

In order to preserve rainwater. According to the plot of Xiao Jie Yu, we know that Li Sixi is the Eighth Route Army hidden in the enemy ranks. Du pretends to be a driver and Wang pretends to be a kannika nimtragol, and together with Li Sixi, he saves the rain. Xiao Jie Yu tells the heroic story of Yu's clever and brave response to the Japanese army.