Legal analysis: you can apply for a guarantee, otherwise the arrested actor can only come out after the detention time expires. The public security organs arrested him only to assist in the investigation. If the debtor fails to repay the creditor's rights, the creditor may bring a lawsuit directly to the court, and shall provide creditor's rights certificates such as IOUs, receipts, IOUs and other evidence that can prove the existence of the legal relationship between lending and borrowing. If the creditor's rights certificates such as IOUs, receipts and IOUs held by the parties do not specify the creditor, and the parties holding the creditor's rights certificates file a private lending lawsuit, the people's court shall accept it.

Legal basis: Civil Code of People's Republic of China (PRC).

Article 392 Where the secured creditor's right is secured by both things, and the debtor fails to perform the due debt or the parties agree to realize the security interest, the creditor shall realize the creditor's right in accordance with the agreement. If the debtor provides the guarantee by himself, the creditor shall first realize the guarantee provided by three creditors for the guarantee of the property. The creditor may realize the secured creditor's right of the property or request the guarantor to assume the guarantee responsibility. The third party providing the guarantee shall have the right to recover from the debtor after assuming the guarantee responsibility.

Article 667 A loan contract is a contract in which the borrower borrows money from the lender, repays it at maturity and pays interest.