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JIT production is a unique multi-variety, small batch, high quality and low consumption manufacturing mode gradually established by Toyota Motor Company of Japan according to its own characteristics. The basic principle of JIT production comes from the management mode of supermarket on demand, that is, the supplier delivers the goods to the required place at the specified time according to the requirements of order summons (Kanban). That is to say, only at the "required time, supply the required quality and quantity of products", specifically, the quality, quantity and time of the products processed or supplied in each stage are determined by the demand in the next stage. Therefore, JIT production refers to a kind of production mode in which machines and equipment with strong versatility and high degree of automation are adopted at all levels of production organization, aiming at continuously reducing costs, no waste products and zero inventory. In short, in the face of the changing market, we should provide customers with the required products and services at the lowest possible cost, in accordance with the required quantity and with perfect quality, so as to meet the needs of customers to the greatest extent.　　讲述度过人生最后时光的男主（金正贤 饰），为了因为他而毁掉自己的人生的女主（徐珠贤 饰）而赌上全部、拼死奋斗的故事。本剧通过刘三姐不平凡的经历，不为人知的故事，讲述了刘三姐的传奇故事，展现了广西的民风民情和秀美的大好河山。刘三姐是民间歌手，乐于助人，聪明美丽，她巧断葫芦案，解救使女香草，用“鹦鹉偷簪”、“巧断猫案”，智斗贪官县令。她在柳州传歌，去邕城参加南国歌会，又“矮人寨智救逃婚妹”、“风雨桥同唱礼仪歌”。在大唐特使召见时，大唱“警世真歌”，为民请命，为民代言。土司桂万山、秀才张伟望、阿龙等人帮助三姐渡过重重难关。而对三姐怀恨在心，一心报复的慕仁环则用尽阴谋诡计，迫害三姐，最后被一一击败，落得可耻下场。1922年，在苏城这个有着百年清誉江南小城，甄府是一个雄霸一方，风光了百余年，摇曳着腐朽、糜烂气息的封建大家族，甄千业是甄氏家族中的太上皇，是一个敢说敢做的混世大枭雄和占尽苏城金钱权势的大恶霸。甄家大少爷风流倜傥、儒雅英俊然而却嗜吸鸦片，整天醉心于灯红酒绿的奢靡生活。甄府少女甄妤虽拥有闭月羞花之貌却满身都是恶习，还嗜食鸦片，举止开放成了一朵即将绽放的恶之花！Is to create a factory class to create instances of some classes that implement the same interface. First, look at the following diagram: