Yellow lion in the south, what does the red flag in the middle of the sky mean?
Red flag. Historical Records Biography of Huaiyin Hou: "Choose Qingqi 2,000, hold the red flag, and see Zhao Jun from the idle road." Yuan Chengting's poem Farewell to the Taishou says: "Two horses crossed the red flag, and five horses carried Zhu Lun." The third and sixth chapters of Yue Biography: "The red flag reflects the sunlight."