Legal analysis: Under normal circumstances, once the installment business is successfully handled, it cannot be cancelled. When you handle the installment, you will be prompted.

legal basis: article 634 of the civil code of the people's Republic of China. if the amount of the installment payment that the buyer fails to pay the due price reaches one fifth of the total price, and the buyer fails to pay the due price within a reasonable period after being urged, the seller may request the buyer to pay the full price or terminate the contract.

if the seller terminates the contract, it may request the buyer to pay the royalties of the subject matter.