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2. The coupling between the publisher and the subscriber is reduced. The publisher only publishes a message, and it does not care how the message is used by the subscriber. At the same time, the subscriber only monitors the event name of the publisher. As long as the event name of the publisher remains unchanged, it does not care how the publisher changes. Similarly, the seller (publisher) only needs to tell the subscriber (buyer) about the arrival of shoes, regardless of whether the buyer buys or not, or whether he buys other sellers. As long as the shoes arrive, the subscriber can be notified.Abstract factory mode refers to providing an interface to create a series of related or interdependent objects, so that clients can create product objects in multiple product families without specifying the specific type of products, emphasizing the change of "series objects". The main points of its implementation include:泰国版《宫》改编自韩国同名电视剧《宫》..重新来过，周行文只想牵着爱的人，没有遗憾，好好过一生。According to Liang's confession, after the victim fainted, she pulled her into the kitchen, put on gloves and held an 18.5 cm fruit knife. The knife was cut off from the victim's navel and his stomach was cut open. 　　In an interview with the parents of Jiang Yang's expected primary school students, the students of the practice team heard a completely different voice from the school: the teacher's qualification was low, the teaching was not responsible, the children were allowed to cheat in exams in order to achieve results, the school had potential safety hazards, and junior high schools were set up at random... All kinds of problems surfaced. What kind of education do the students receive? Did school really follow the tenet of "everything for children"? The players were very worried.　　三个家庭每天都要面对各种新的问题与困扰，彼此往来间也不可避免的产生了一些不愉快。不过只要抱持着积极乐观的心态，难题总会迎刃而解，欢乐的生活也依旧会继续。