2. As early as the Warring States Period, Yan Zhaowang Jiping invited Zou Yan and other sages of Qi to help govern the country. Some people in Yan were dissatisfied with Zou Yan and slandered Zou Yan in front of the Prince. It was in the midsummer of June, and there was a blizzard in the sky. The prince realized Zou Yan's injustice and let him go.
3. The story of Zou Yan was first told in June, and later it was interpreted by Ren Yuan. Liu Yuchuan of the later Han Dynasty quoted Huainanzi as saying, "Zou Yan is loyal to Yan Wanghui. Slap it left and right, the king binds it, (Yan) cries, and the frost in May. " This was an unjust case, which was finally solved. Later generations used "Six In the snow" as a metaphor for unjust imprisonment.