Stigma: A dynamic process in which a group imposes human inferiority on another group and maintains it. It is a stereotype of the negative characteristics of a group, and thereby masks other characteristics, and becomes essentially a group The indicator corresponding to the feature. In this process, the most commonly used strategy by the strong and unstigmatized party is "tagging". Which of the following phenomena are not stigma? ['Deteriorating public security in a city, citizens complain that the migrant workers are flowing into the city.', 'Hangzhou-born Wei despised his wife from the countryside, thinking she was rustic and uneducated.', 'A restaurant advertises: "This restaurant recruits a waiter, no one from XX will consider it".', 'In old Shanghai, northern Jiangsu was regarded as a lazy group and excluded from the Shanghai marriage circle.']