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The code for creating the object is encapsulated and the specific factory class is instantiated, thus achieving the purpose of encapsulation and instantiation. Encapsulating the code that creates the object in one place can also achieve the purpose of reuse and is more convenient for later maintenance. This also means that when the customer instantiates the object, he will only rely on the interface and not on the specific implementation. Help us to better achieve interface programming rather than implementation, making the code more flexible to cope with future extensions.北方隔着大江就是九江国，可能过不了多久，九江国就要彻底沦为项羽的属地。王朝的风云变幻,一群英雄的生死未卜,一段情缘的爱恨难分。曲折离奇，神秘莫测。，但神秘的红花会单翼蜻蜓不断出现，使乾隆陷入虎穴，困难重重，险象环生…… 　　乾隆与香香公主相遇，空空儿与方世玉相爱，但情仇难容，引出诸多是是非非,到底谁是单蜻蜓？红花会的主脑是谁？各美女的命运又是如何？串串连环之谜，曲折离奇！Click "Close Block Editor" and click "Yes" in the pop-up dialog box to exit the "Block Editor".