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This is the second sub!(2) Multiple factory method modes?昔年秦国占领此处时还曾多方寻找，只是诸先生隐居会稽山中，并未找到。Bridging mode is to separate things from their concrete implementation so that they can change independently. The purpose of bridging is: Decoupling abstraction and implementation, So that the two can be changed independently, Like our commonly used JDBC bridge DriverManager, when JDBC connects databases, it switches between databases without moving too much code or even at all. The reason is that JDBC provides a unified interface, each database provides its own implementation, and a program called database driver is used to bridge. Let's look at the diagram:在奔腾激越、云缠雾绕的怒江大峡谷，一个月黑风高的晚，土匪头子山豹爷带人洗劫了傈僳族人世代居住的地方傈僳山寨。傈僳族头人墨觉长老在撕杀中死于山豹爷的枪口下后，一枚象征着傈僳族头人权利的米斯牛头印章不翼而飞，值得庆幸的是，墨觉长老刚出生的女儿娜斯雨大难不死。霍元甲的大徒弟陈真，因杀日本特务遭通缉，隐姓埋名流亡沙漠。偶遇土匪劫掠商队，杀人如麻，陈真忍不住挺身而出，救下白沙堡主韦天霸之子。此时，日本特务山口野雄也来到白沙堡，要暗杀韦天霸，强占矿山，为侵华做准备。韦被害，临终时将秘藏的中国矿藏分布图交给陈真带往江城。