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Factory Pattern: Factory Pattern is a frequently used pattern. Classes implemented according to Factory Pattern can generate instances of one of a group of classes according to the provided data. Usually, this group of classes has a common abstract parent class and implements the same methods, but these methods perform different operations for different data. First of all, we need to define a base class. Subclasses of this class implement methods in the base class through different methods. Then you need to define a factory class that can generate different subclass instances according to conditions. After getting an instance of a subclass, developers can call methods in the base class regardless of which subclass instance is returned.1940年初，伪满医院医生常青是位进步爱国医生，一直利用职务之便为抗联秘密提供药品，安全起见，一直瞒着丈夫。当常青与丈夫年定邦欲离开伪满去关内生活之时，意外得知日军有大批军火秘密入华。常青决定留下阻止，这让不知实情的丈夫很是不解与焦虑。丈夫年定邦曾是国民党力主抗日派。事实让他认清了国民党真剿共消极抗日实质。一次行动中诈死隐居，隐居生活中与常青相恋结合。此时的浩风也被国民党特务找到并以常青的安危作筹码，逼其参与阻止日军秘运军火。夫妻俩为了国家的安危和对方的安全，互相隐瞒着身份并产生了很多误解。在这次行动中，年定邦被抗联战士大无畏的精神所打动。在战火的洗礼中，两人最终坦诚相待、携手完成任务。Regarding the author of this book, Haret Aban, Japan's Matsumoto Chongji made the following description in "Shanghai Times" (Shanghai Bookstore Publishing House, 2005):这回的事比较大，又在打仗的节骨眼上，皇上心里气不顺，只能等风头过了再说。　　他害怕真正的自己不适合像Gilayn这样完美的人,这就是为什么他要保密...