Back then, to save the Rou Ran City of the Ashi Liren, Suo Lun blew up Grand Duke Lanshi.
And Grand Duke Lanshi had two sons, Snow Marquis Lan Ye and Crown Prince Lan Tu. After the Grand Duke's death, his consort Ji Hui (the Flame Emperor's sister) immediately started a campaign, claiming that the Grand Duke Lanshi's death was the punishment of the Celestial Dragon, saying Crown Prince Lan Tu's warmongering enraged the Celestial Dragon, thus they should strip him of his title and support her son, Snow Marquis Lan Ye, to ascend.
At that time, Crown Prince Lan Tu was leading an army of hundreds of thousands to attack Helan Pass in Rou Ran Province. Upon hearing of the disturbance back home, he immediately retreated.
