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　2019年5月，几十位作家来到山西汾阳的一个小村庄，他们在这里谈论乡村与城市，文学与现实。影片以此为序曲，交响乐般地以18个章节讲述出1949年以来的中国往事。出生于上世纪50年代、60年代和70年代的三位作家贾平凹、余华和梁鸿成为影片最重要的叙述者，他们与已故作家马烽的女儿一起，重新注视了社会变迁中的个人与家庭，让影片成为一部跨度长达70年的中国心灵史。Public void update ();还不怪你，要不是认识你，我早就答应了。Li Shanglong rummaged through his wallet: "No change." This classmate's face is a little upset. Li Shanglong said: "Otherwise, I'll buy lunch." The classmate's face spread out and said, "Good."于是将盔甲穿戴整齐，在正午人最多的时候，飞身跃上高台。State mode and policy mode are like twins. They both encapsulate a series of algorithms or behaviors. Their class diagrams look almost identical, but their intentions are very different, so they are two very different modes. The policy pattern and the state pattern have in common that they both have a context, policies or state classes to which the context delegates the request to execute