diff --git a/iptables/china-block.sh b/iptables/china-block.sh
index 19b06df..f8425cc 100755
--- a/iptables/china-block.sh
+++ b/iptables/china-block.sh
@@ -9,9 +9,6 @@ SOURCES=(
     "https://raw.githubusercontent.com/mayaxcn/china-ip-list/master/chnroute.txt"
 )
 
-echo "[*] Killing Steam..."
-pkill -9 -f steam || true
-
 echo "[*] Downloading CN IP ranges..."
 for url in "${SOURCES[@]}"; do
     echo "    Trying $url ..."
@@ -46,8 +43,8 @@ iptables -t raw -A OUTPUT -m set --match-set "$IPSET_NAME" dst -j DROP
 
 CIDR6_FILE="/tmp/cn6.cidr"
 SOURCES6=(
-    "https://raw.githubusercontent.com/herrbischoff/country-ip-blocks/master/ipv6/cn.cidr"
-    "https://www.ipdeny.com/ipv6/ipaddresses/blocks/cn.cidr"
+    "https://raw.githubusercontent.com/gaoyifan/china-operator-ip/ip-lists/china6.txt"
+    "https://raw.githubusercontent.com/ipverse/rir-ip/master/country/cn/ipv6-aggregated.txt"
 )
 
 echo "[*] Downloading CN IPv6 ranges..."
diff --git a/iptables/install.sh b/iptables/install.sh
old mode 100644
new mode 100755
index 3c0933e..0209716
--- a/iptables/install.sh
+++ b/iptables/install.sh
@@ -1,10 +1,26 @@
 #!/bin/bash
 set -e
 
-install -m 755 china-block.sh   /usr/local/sbin/china-block.sh
-install -m 755 china-unblock.sh /usr/local/sbin/china-unblock.sh
-install -m 644 china-block.service /etc/systemd/system/china-block.service
+install_() {
+    install -m 755 china-block.sh   /usr/local/sbin/china-block.sh
+    install -m 755 china-unblock.sh /usr/local/sbin/china-unblock.sh
+    install -m 644 china-block.service /etc/systemd/system/china-block.service
+    systemctl daemon-reload
+    systemctl enable --now china-block
+    echo "[+] china-block service installed and started."
+}
 
-systemctl daemon-reload
-systemctl enable --now china-block
-echo "[+] china-block service installed and started."
+uninstall() {
+    systemctl disable --now china-block 2>/dev/null || true
+    rm -f /usr/local/sbin/china-block.sh
+    rm -f /usr/local/sbin/china-unblock.sh
+    rm -f /etc/systemd/system/china-block.service
+    systemctl daemon-reload
+    echo "[+] china-block service removed."
+}
+
+case "${1:-install}" in
+    install)   install_ ;;
+    uninstall) uninstall ;;
+    *) echo "Usage: $0 [install|uninstall]"; exit 1 ;;
+esac