No handling fees and interest are charged. When you buy things in the mall, as long as you choose the installment products provided by the mall, there are no handling fees and interest. Please set up automatic linking of debit card repayments to make it more convenient.
However, the prices in credit card malls are more expensive than other online merchants, so it is best to use your mobile phone to shop according to your own needs, and do not just pursue the temptation of no interest.