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The general code is like this, and I feel that the code using the intermediary mode is similar, so I won't introduce it much here. The code in the book has advantages, but I don't feel that there is much difference, so I no longer use the intermediary mode to write code here. State mode is an unusually excellent mode, which may be the best way to solve some requirement scenarios. Although the state mode is not a simple to clear mode (it often brings about an increase in the amount of code), once you understand the essence of the state mode, you will certainly thank it for its incomparable benefits in the future. The key to the state mode is to distinguish the internal state of things. Changes in the internal state of things often bring about changes in the behavior of things. This article describes the state mode in detailData show that there were more than 6,000 companies engaged in private lending intermediary business when P2P platforms were in hot demand in China. After three years of survival of the fittest, according to incomplete statistics, there are only 1,958 platforms left. It can be predicted that the number of P2P platforms will continue to decrease. At present, some financial intermediary companies in Yixin, Auction, Qifang and Qingdao are relatively recognized. The following is a typical analysis of these P2P enterprises. Auction and loan: unsecured and unsecured mode. Auction and loan was established in Shanghai in 2007. It is a typical P2P online credit platform in China and can be used as a typical sample of P2P websites in China. Auction and loan use competitive bidding to realize the online lending process. The loan interest rate is determined by the supply and demand market of the borrower and the bidder. The enterprise does not charge other fees, and the main profit comes from service fees. The main process is as follows: the borrower releases the loan information, lists the relevant information such as the reason and amount of the loan, and gives the highest interest rate. Investors participate in the bidding, and the person with the lower interest rate wins the bid. The web page will show the borrower's loan progress and the number of bids completed. If the total amount of bid funds meets the needs of the borrower during the fund raising period, his loan will be declared successful. If the required funds cannot be raised within the prescribed time limit, the loan plan will be suspended. This mode of risk control has two characteristics:故事讲述了富家千金孙唯伊（吴哲晗 饰）一朝家庭败落，开启打工奋斗的自强之路时，被如今摇身一变成为HB电商总裁的白泽柳（周兆渊 饰）再度追爱，最后有情人终成眷属的故事。与此同时，东头一间雅间内，皇孙秦旷正与几位少年吃酒，听见黄豆的喊声，先是面现不可置信的神色。四丈……庞夫人嘀咕了一下，是不是太少了？本钱少，再多扩不起了。而网上，这时候已经炸开锅了，无数人在不停地刷屏，赞同的大赞，不认同的就在痛骂。