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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.How to get it: lucky draw or QB purchase.Mangle table: the function of dismantling messages, making modifications and re-encapsulating; Iptable_mangle简介：为了照顾淘气的孩子，你需要一位新一代后妈，温柔慈爱，性格好，就像Tammy一样。Tammy，25岁，一个在纽约学习时尚设计的女生，被姐姐要求尽快返回泰国临时顶替她照顾Treelode（一个帅气的外交官）的孩子。在结婚之前Treelode对Tammy一无所知，Treelode被派驻到印度洋边的一个国家去保护Tunga Tunga王子。没见过未婚妻的Treelode意识到他还不清楚自己未婚妻的性格。Treelode和王子谋划了一出戏来试探Tammy。他们分别假扮成有着强壮肌肉的...白果绕着那个大火桶转了两圈，啧啧赞叹了两声，又问晚上睡觉冷怎么办。该剧描写了四位武艺、兵器均各具特色，而性格也各有独突的“四大名捕”，追录刺杀皇帝的凶手集团的故事。然而追查的结果，连四大名捕本身也始料不及，所遇到的阻力危险，竟然并非来自凶手集团，而是名捕所意想不到的力量。