Not cost-effective. Although the 50% discount is indeed better than no discount, there is still a handling fee. Although there is a discount, you still suffer a loss. For example, China Merchants Bank's handling fee for six installments is 0.75%. Assuming that the bill is 10,000 yuan, a handling fee of 75 yuan will be charged every month. As the period selected is longer, the principal is higher and the loss is greater.