小三永远都是不见光
[xiăo sān yŏng yuăn dōu shì bù jiàn guāng]
It can be understood as 'The mistress will always stay behind the scenes'. In China, a '小三' refers to a mistress in a romantic relationship, indicating the status of such people is unofficial and cannot see the daylight. This title also reflects an attitude towards an unethical position in society.