The correct answer to the question is A, which is CNY 2.52 million. This is calculated by determining the 99% Credit Value at Risk (VaR) for a 1-year zero-coupon bond. The 99% CVaR is defined as the 99th percentile of the unrecovered credit loss minus the Expected Loss (EL).

From the given data:

• The face value of the bond is CNY 630 million.
• The expected 1-year probability of default (PD) is 6%.
• The 1-year recovery rate is 90%.
• The analyst's estimate of the bond's value at the 99% confidence level is CNY 567 million.

The 99th percentile of the unrecovered credit loss is calculated as the difference between the face value and the estimated value at the 99% confidence level, multiplied by the probability of default and the recovery rate (1 - recovery rate): $99th \text{ percentile of unrecovered credit loss} = (630 - 567) \times (1 - 0.9) \text{ million} = 6.3 \text{ million}$

The Expected Loss (EL) is calculated as the product of the probability of default, the loss given default (LGD), and the exposure at default (EAD): $\text{EL} = \text{PD} \times \text{LGD} \times \text{EAD} = 0.06 \times (1 - 0.9) \times 630 = 3.78 \text{ million}$

Finally, the 99% CVaR is the difference between the 99th percentile of the unrecovered credit loss and the Expected Loss: \text{CVaR at 99% confidence level} = 6.30 - 3.78 = 2.52 \text{ million}

This calculation leads to the conclusion that the bond's implied 1-year 99% credit VaR is CNY 2.52 million, which corresponds to option A.