The crime of contract fraud: refers to the act of illegally possessing a large amount of money in order to defraud the other party's property in the process of signing and fulfilling the contract by using fictitious facts or concealing true and equivalent deception. Which of the following is not crimes of contract fraud? ['Zhou used fake financial bills to deceive the trust of the other party and obtain his property in the process of signing the contract for execution, a large amount.', "In order to expand his business, Song signed a contract with Company A to purchase Company A's 500,000 yuan worth of electrical products, and stated that the money will be delivered. The next day, after Song remitted 50,000 yuan in cash, the amount on the draft stub Changed to 500,000 yuan, copy, fax to company A. trick company A to send all the goods.", 'Using a pseudonym of Song, Wu signed insurance agency contracts with Yongan Property Insurance Beijing Branch and Zhonghua United Property Insurance Fangshan Branch, agreeing to sell insurance business on behalf of the company, and obtained a certain percentage of handling fees. As of the end of the year, Wu received a total of nearly 315,000 yuan in insurance premiums, but refused to deliver to Yongan Company and squandered it.', "Lin took advantage of Renmou City's industrial and commercial bureau accountant to keep the check of his unit, privately engraved the seal of the cashier Deng, the director Chen and the unit's official seal, and repeatedly issued checks in private, cheating his unit's funds totaling 200,000 yuan."]