Contract transfer: refers to the change of the contract subject, that is, the new contract party replaces the old contract party, but the object of the contract, that is, the subject matter of the contract has not changed. There are two cases of contract transfer: First, the transfer of creditor The original creditor transferred its creditor's rights to the new creditor, so that the new creditor replaced the original creditor; the second is the debt commitment, that is, the new debtor replaces the original debtor to bear the debt. In both cases, the creditor and the debtor have changed. The content has not changed. Which of the following is not a contract transfer situation? ['Xiao Wang owes Xiao Li 100 yuan, but for some other reason, let Mr. Zhang pay the debt for Xiao Wang.', 'Xiao Li returned the 1,000 yuan loaned to him by Wang. Now Wang is not here. Xiao Li asks his neighbors to collect it for him and waits for him to return to Xiao Wang.', 'Xiao Wang lent Xiao Li 1,000 yuan, but Xiao Wang asked Xiao Li to return the money to Mr. Zhang.', 'Company A paid 100,000 yuan to help Company B repay the debt to Company C, and Company B helped Company A to recover the debt owed to Company D.']