飞霜六月

Explanation: Old metaphor of a miscarriage of justice. 　　Source: Tang Zhang said, "prison Proverbs": "every man knot angry, June Feishuang." 　　Examples: You Xuan Road is heat, not that snowy day, Qi Buwen ~ by Tsou Yen. (Yuan Guan Hanqing "Snow in Midsummer," the third off)