How to design the sampling circuit for BL0942 used in smart products for measurement?

When the BL0942 is used in the category of sockets/power strips/circuit breakers, the ratio of voltage division resistance to current sampling resistance refers to the official reference schematic of BL0942.

Voltage sampling division ratio is 390K*5: 0.51K, and the current sampling resistance is 1 milliohm.

When the BL0942 is applied in the category of metering circuit breakers, the voltage sampling division ratio is 390K*5: 0.51K. The current sampling uses a current transformer with a ratio of 2000:1, matched with a 1 ohm resistor.