The installment music legal department called to sue.

Legal analysis: This is a common collection method. Next you can call your brother's school.

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

Article 670 Interest on a loan shall not be deducted from the principal in advance. If the interest is deducted from the principal in advance, the loan will be repaid according to the actual loan amount and the interest will be calculated.

Article 671 Where the lender fails to provide the loan on the agreed date and amount, thus causing losses to the borrower, it shall compensate for the losses. If the borrower fails to collect the loan according to the agreed date and amount, it shall pay interest according to the agreed date and amount.

Article 672 The lender may inspect and supervise the use of the loan as agreed. The borrower shall regularly provide relevant financial and accounting statements or other materials to the lender as agreed.

Article 673 Where the borrower fails to use the loan according to the agreed purpose, the lender may stop issuing the loan, recover the loan in advance or terminate the contract.

Article 674 The borrower shall pay interest at the agreed time limit. If the time limit for paying interest is not stipulated or clearly stipulated, and cannot be determined according to the provisions of Article 510 of this Law, if the loan period is less than one year, it shall be paid together with the loan; If the loan term is more than one year, it shall be paid at the end of each year; if the remaining term is less than one year, it shall be paid together with the loan.

Article 675 The borrower shall repay the loan within the agreed time limit. If the term of the loan is not agreed or clearly agreed, and cannot be determined according to the provisions of Article 510 of this Law, the borrower may return it at any time; The lender may urge the borrower to return it within a reasonable period of time.

Article 676 If the borrower fails to repay the loan within the agreed time limit, it shall pay the overdue interest in accordance with the agreement or the relevant provisions of the state.

Article 677 Where the borrower repays the loan in advance, unless otherwise agreed by the parties, the interest shall be calculated according to the actual loan period.

Article 678 The borrower may apply to the lender for extension before the repayment period expires. If the lender agrees, it can be extended.

Article 679 A loan contract between natural persons is established when the lender provides the loan.

Article 680 usury is prohibited and the loan interest rate shall not violate the relevant provisions of the state. If there is no agreement on the payment of interest in the loan contract, it shall be deemed that there is no interest. If the loan contract does not specify the payment method of interest, and the parties cannot reach a supplementary agreement, the interest shall be determined according to the local or the parties' trading methods, trading habits, market interest rates and other factors; Loans between natural persons are regarded as interest-free.