diff --git a/target/linux/rockchip/armv8/base-files/etc/board.d/02_network b/target/linux/rockchip/armv8/base-files/etc/board.d/02_network
index 6b78675b5..267cf2ddc 100755
--- a/target/linux/rockchip/armv8/base-files/etc/board.d/02_network
+++ b/target/linux/rockchip/armv8/base-files/etc/board.d/02_network
@@ -37,13 +37,36 @@ rockchip_setup_interfaces()
 	esac
 }
 
-nanopi_r2s_generate_mac()
+generate_mac_from_mmc_cid()
 {
-	local sd_hash=$(sha256sum /sys/class/block/mmcblk*/device/cid | head -n 1)
+	local mmc_dev=$1
+
+	local sd_hash=$(sha256sum /sys/class/block/$mmc_dev/device/cid)
 	local mac_base=$(macaddr_canonicalize "$(echo "${sd_hash}" | dd bs=1 count=12 2>/dev/null)")
 	echo "$(macaddr_unsetbit_mc "$(macaddr_setbit_la "${mac_base}")")"
 }
 
+nanopi_r4s_get_mac()
+{
+	local interface=$1
+	local eeprom_path="/sys/bus/i2c/devices/2-0051/eeprom"
+	local address
+
+	if [ -f "$eeprom_path" ]; then
+		address=$(get_mac_binary "$eeprom_path" 0xfa)
+		if [ "$interface" = "lan" ]; then
+			address=$(macaddr_setbit_la "$address")
+		fi
+	else
+		address=$(generate_mac_from_mmc_cid mmcblk1)
+		if [ "$interface" = "lan" ]; then
+			address=$(macaddr_add "$address" 1)
+		fi
+	fi
+
+	echo "$address"
+}
+
 rockchip_setup_macs()
 {
 	local board="$1"
@@ -61,17 +84,13 @@ rockchip_setup_macs()
 	friendlyarm,nanopi-r2s|\
 	friendlyarm,nanopi-r5s|\
 	sharevdi,guangmiao-g4c)
-		wan_mac=$(nanopi_r2s_generate_mac)
+		wan_mac=$(generate_mac_from_mmc_cid mmcblk0)
 		lan_mac=$(macaddr_add "$wan_mac" +1)
 		;;
 	friendlyarm,nanopi-r4s|\
 	friendlyarm,nanopi-r4se)
-		if [ -f /sys/bus/i2c/devices/2-0051/eeprom ]; then
-			wan_mac=$(get_mac_binary "/sys/bus/i2c/devices/2-0051/eeprom" 0xfa)
-		else
-			wan_mac=$(nanopi_r2s_generate_mac)
-		fi
-		lan_mac=$(macaddr_setbit_la "$wan_mac")
+		wan_mac=$(nanopi_r4s_get_mac wan)
+		lan_mac=$(nanopi_r4s_get_mac lan)
 		;;
 	xunlong,orangepi-r1-plus|\
 	xunlong,orangepi-r1-plus-lts)