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故事发生在陕西，农民刘高兴（郭涛 饰）是个喜欢设计飞行器的有心人。迫于生计，他跟好兄弟五富（冯砾 饰）一起来到西安打工，在老乡韩大宝（林雪 饰）的一间破旧仓库落脚，邻居包括东北大汉黄八（海一天 饰）和一对夫妇种猪（巴多 饰）和杏胡（苗圃 饰）。高兴的工作是收废品，虽然工作不那么光鲜，但是高兴却乐在其中，这种积极的心态感染了五富和邻居夫妇。另外，碰到小流氓石热闹（黄渤 饰）寻衅滋事，也是高兴挺身而出惩恶扬善。这是一部以急速发展的中国IT产业为北京的当代都市情节剧，就读于清华大学的三个同窗好友彭力轩、易之迅、裴友明同为击剑部主将，人称“三剑客”，他们都爱上了教授的女儿米雪。 随着内心爱情的愈发深厚，三人的关系也都微妙起来。为了不影响他们的友谊，米雪无奈之下选择出国。暗藏心机的友明利用从米雪处得来的资料也出了国，并利用米雪一人在外的孤独感，取得了米雪的信任。 　　毕业几年后，各奔东西的三名好友都闯出了自己的一番天地，在有着中国硅谷之称的北京中关村，年轻的他们是名副其实的IT精英。刚刚归国担任美国维申公司驻中国区总裁的友明在给大家带来惊喜地同时宣布了他与米雪订婚的消息，使得力轩和之迅大为震惊。在失落和猜疑之中，又有两名性格迥异的女孩分别闯入了他们的生活；与此同时，伴随着误解、背叛、阴谋和爱情，惊心动魄的IT商战开始了。 　　三位昔日同窗，各自代表着国企、民营资本和跨国公司的利益，上演了一幕又一幕的恩怨纠葛。在友情与爱情、个人与国家之间，一次又一次地权衡挣扎，命运的天平最终会偏向哪一方？L here is the largest and oldest Taoist stone statue in existence in our country-Laojun Rock!In real life, China's income tax is divided into enterprise income tax, foreign-invested enterprises or foreign-invested enterprises income tax and personal income tax. For these three types of income tax, each is calculated in a different way. Personal income tax has a personal income tax calculation method, while enterprise income tax has its corresponding calculation method. If we do not adopt the policy mode to realize such a requirement, we will define an income tax class, which has an attribute to identify the type of income tax and a CalculateTax () method to calculate the tax. In this method, we need to judge the tax type and calculate the income tax for different tax types through if-else statements. Such an implementation can indeed solve this scenario, but such a design is not conducive to expansion. If the system needs to add an income tax in the later period, it has to go back and modify the CalculateTax method to add an additional judgment statement, which clearly violates the principle of "open-closed". At this time, we can consider using the strategic mode to solve this problem. Since the tax method is the changing part of this scenario, we can naturally think of abstracting the tax method at this time, which is also the essence of the implementation of the strategic mode.Return handler;Software Firewall: Firewall that applies software processing logic to run on a common hardware platform with low performance and low cost.1 In case of failure on the highway during the day or at night, the warning sign shall be set at 50 ~ 100 meters behind the vehicle.