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"Charming Card" starts with the specific needs of tourists, With the preferential treatment of hotels, scenic spots and other consumption scenes to leverage the huge value of the industrial chain of eating, living, traveling, traveling, purchasing and entertaining, So as to realize win-win results for cities, scenic spots, tourists, platforms and other parties, promote the transformation of ticket economy to industrial economy, and the transformation of closed tourism from self-circulation to open "tourism plus", better meet the needs of tourism consumption, and have a far-reaching impact in the process of developing quality tourism and making people feel more comfortable.For interface programming, a lot of changes that may occur in the system in the future can be isolated. Why? If the code is written for an interface, he can implement the interface with any new class through polymorphism. However, when the code uses a large number of specific classes, once new specific classes are added, the code must be changed. Violating the opening and closing principle.It is emphasized here that the request on the link can be a chain, a tree or a ring. The pattern itself does not restrict this and needs to be implemented by ourselves. At the same time, at a time, commands are only allowed to be passed from one object to another, not to multiple objects.新的一学年开始了，结束了大一的骄傲和浮躁之后，桥川、钟白、任逸帆等人顺利进入了大二。肖海洋也通过了大一的考试，如愿以偿没有留级。大一的同窗情谊依旧继续。过了一个假期，大二伊始，旧同学的离开和新同学的加入，让他们之间的关系也发生了微妙变化。顾一心随家人去了美国上学， 毕十三把这份牵挂变成了学习上奋进的动力。转学生许连翘新转入电摄班并貌似带着神秘的任务。原班主任的离开，让原本散漫的电摄班开始团结。人物的新旧交替，和大二课业的丰富与繁重，2015级电摄班大二的同窗故事更加精彩。这时的他们褪去了大一的青涩，迎来大学中成长速度最快的一年。九个人开启了各自的梦想，并在跌跌撞撞中实现自己的梦想。又是一年大学时光的流逝，九位同窗好友之间的情谊越来越浓。就在战役即将开始之际，一架载有中国情报军官的盟军飞机失事，中国军队怒江战役作战计划和电台密码不慎落入日军滇缅情报机构“芒市一号”手中，日军滇缅情报机关头目岛田大佐采用欲盖弥彰手段，故意制造机毁人亡的假象蒙蔽我军指挥系统。 　　There is something to say to Tou Jun: The rights protection of the Tou Family is still relatively mild and the progress is relatively obvious. According to August 3, the Tou Family has been recovered by the police by 81 million yuan. This is good news for investors, although the amount is not large.阮清恬到底还是遭不明身份的人绑架，任浩铭为了阮清恬的安全，开始全天候“监视”阮清恬，而脾气倔强的阮清恬无法忍受这一切，频频与任浩铭发生冲突……然而就在这些冲突中，两人的心越走越近……可是从国外归来的任浩铭姐姐任青青误会了阮清恬的身份，百般阻挠任浩铭与阮清恬恋爱。任浩铭对阮清恬不离不弃，两人好容易冲破了任青青的阻碍，此时任浩铭的旧识曼宁又出现……可是曼宁早已离世，这个曼宁的出现难道是有人故意策划的阴谋？又是谁策划的阴谋呢？