Crossing, or a substitute? The ancient female hero's Hua Mulan traveled to the present world through time and space, and found that Xiao Li feng was exactly the same as the dead Xiangfan. Is this a coincidence of history? Or is it the meaning of her miraculous crossing? For this reason, Mulan became Xiao’s little assistant and small nanny, and the two began to live together in a fun and interesting life.