Depositing 0.05 yuan into a Bank of China credit card account means that 0.05 yuan is deposited into the credit card account. This operation can involve the cardholder depositing cash into the credit card account through an ATM machine or counter, or transferring funds into the credit card account through transfer from other bank accounts.

Depositing 0.05 yuan may be a test operation or a wrong operation, because the deposit amount of 0.05 yuan is small. Generally speaking, cardholders deposit funds into their credit card accounts to repay debts or overdrafts and other arrears to ensure that the balance in the credit card account is sufficient to cover credit card consumption and overdrafts.

It should be noted that if the amount deposited by the cardholder is insufficient to pay the credit card balance, overdue fees, interest and other related charges may be incurred. Therefore, when using a credit card, cardholders need to make timely repayments to avoid additional charges.