Because Lu Sixuan crawled out of his mother's belly one year and three months earlier than Zhu Xiaoxi, he regarded himself as Zhu Xiaoxi's elder.
At that time, Lu Sixuan, who had already learned to walk, grabbed Zhu Xiaoxi's fleshy little hand and asked her to call her "brother." Zhu Xiaoxi could mumble a few words just now, so she said: "Get out."