Definition: Lavender: vanilla, metaphor for good; " unk ": stinky grass, metaphor for evil. Lavender is mixed together, only smelling the stench but not the fragrance. The metaphor of good is often covered up by evil.

Allusions: In the Spring and Autumn Period, Duke Xian of Jin had several wives: the first wife, married from Jia State, had no children; the other wife, originally his father's concubine, named Qi Jiang, was born to the crown prince Shensheng, and also gave birth to a daughter, married to Duke Qin Mu and became his wife; in addition, he married two girls from Rong State: the eldest surnamed Hu, gave birth to the son Chong Er; the younger surnamed Yun, gave birth to the son Yiwu. Later, Jin State attacked Li Rong, and the king of Li Rong offered his daughter to Duke Xian of Jin in order to seek peace. This was Li Ji, who gave birth to the son Xi Qi; Ji's sister, as a dowry, married Duke Xian of Jin and gave birth to the son Zhuozi.

In this way, Duke Xian of Jin had at least six wives who were openly and legally married. Duke Xian's family was not happy because of this. On the contrary, these concubines, in order to compete for favor, in order to want to be official wives, and all hoping that their sons would become princes in order to obtain the right to inherit the monarch, they often fight and envy each other, and they are in a mess.

Li Ji was the most favored by Duke Xian of Jin. She asked Duke Xian of Jin to make her his wife; she also set up a conspiracy to frame the crown prince Shensheng, spread rumors and slander, saying that other sons were not good, only Xi Qi was the most reliable, and asked Xi Qi to be the crown prince. According to the "Four Years of Zuo Zhuan Gong", Duke Xian of Jin listened to Li Ji's rhetoric and really planned to make her his wife. According to superstitious customs at the time, he first invited the oracle to divination and asked: Would it be fierce or auspicious to make Li Ji his wife? This oracle was not from the faction of Li Ji, and the conclusion of divination was "unauspicious." Duke Xian of Jin was very unhappy, and he asked the oracle again, calling it a hexagram, but the hexagram of the oracle was "auspicious." Duke Xian of Jin was happy and said with a smile, "According to divination, not according to divination." The Buddha disagreed and said, "Divination is not as good as divination, and it should be done according to divination. Besides, I can also divination such a few words: 'The only way to be a special one is to lure the gongzhi; one fumigation and one fumigation, and there is still a stench in ten years.' (That is to say: the result of special favor will inevitably lead to chaos, and it will take away your fat sheep (referring to the throne); the so-called one fumigation and one fumigation, that is, one good and one evil, if the evil energy rises, then it may not be able to eliminate its evil consequences within ten years.) So, you must not act according to the divination!" But Duke Xian of Jin still made Li Ji his wife in the end. Later, he further listened to Li Ji and forced Shen Sheng to die, forced Chong'er and Yiwu away, and made a mess.

The saying in the above story, "one lavender and one shantou", later became an idiom, a metaphor for one good and one evil. According to Du Qian, a scholar of the Jin Dynasty who specializes in "Zuozhuan": "Lavender is a kind of vanilla; shantou is a kind of stinky grass. Vanilla represents good, and stinky grass symbolizes evil."