diff --git a/.github/workflows/lo-test.yml b/.github/workflows/lo-test.yml
index 854d412..3f0b60d 100644
--- a/.github/workflows/lo-test.yml
+++ b/.github/workflows/lo-test.yml
@@ -67,8 +67,8 @@ jobs:
           fi
           ./scripts/feeds update -a
           ./scripts/feeds install -a
-          . $GITHUB_WORKSPACE/merge_packages.sh
-          . $GITHUB_WORKSPACE/patches.sh
+          . $GITHUB_WORKSPACE/scripts/merge_packages.sh
+          . $GITHUB_WORKSPACE/scripts/patches.sh
           cd
           [ $BRANCH != 'master' ] && BRANCH='openwrt-18.06'
           svn export https://github.com/openwrt/luci/branches/$BRANCH luci
@@ -199,7 +199,7 @@ jobs:
           sudo sysctl vm.swappiness=0
           curl -L https://github.com/klever1988/sshactions/releases/download/cache/ib-$DEVICE.tar.xz | tar -Jxvf -
           mv *imagebuilder* ib && cd ib
-          . $GITHUB_WORKSPACE/merge_files.sh
+          . $GITHUB_WORKSPACE/scripts/merge_files.sh
           mkdir -p files/local_feed && sudo mount --bind packages files/local_feed
           sed -i '/luci-lib-base/d;/luci-lib-ipkg/d' include/target.mk
           sed -i 's/luci-app-[^ ]*//g' include/target.mk $(find target/ -name Makefile)
@@ -246,7 +246,7 @@ jobs:
           sudo sysctl vm.swappiness=0
           curl -L https://github.com/klever1988/sshactions/releases/download/cache/ib-$DEVICE.tar.xz | tar -Jxvf -
           mv *imagebuilder* ib && cd ib
-          . $GITHUB_WORKSPACE/merge_files.sh
+          . $GITHUB_WORKSPACE/scripts/merge_files.sh
           sed -i '/local/d;s/#//' files/etc/opkg/distfeeds.conf
           sed -i '/luci-lib-base/d;/luci-lib-ipkg/d' include/target.mk
           sed -i 's/luci-app-[^ ]*//g' include/target.mk $(find target/ -name Makefile)
diff --git a/patches/99-disallow-aaaa.patch b/patches/99-disallow-aaaa.patch
new file mode 100644
index 0000000..3f98698
--- /dev/null
+++ b/patches/99-disallow-aaaa.patch
@@ -0,0 +1,12 @@
+diff --git a/src/dns_query.c b/src/dns_query.c
+index 0b6c9c0..81f2f7a 100644
+--- a/src/dns_query.c
++++ b/src/dns_query.c
+@@ -413,6 +413,7 @@ static int rrs2cent(unsigned char *msg, size_t msgsz, unsigned char **ptr, size_
+ 				break;
+ #if IS_CACHED_AAAA
+ 			case T_AAAA:
++				break;
+ 				/* Validate types we use internally */
+ 				if(rdlength!=16) goto invalid_length;
+ 				goto default_case;
diff --git a/merge_files.sh b/scripts/merge_files.sh
similarity index 100%
rename from merge_files.sh
rename to scripts/merge_files.sh
diff --git a/merge_packages.sh b/scripts/merge_packages.sh
similarity index 100%
rename from merge_packages.sh
rename to scripts/merge_packages.sh
diff --git a/patches.sh b/scripts/patches.sh
similarity index 52%
rename from patches.sh
rename to scripts/patches.sh
index 1fbab99..efd7d0d 100644
--- a/patches.sh
+++ b/scripts/patches.sh
@@ -15,71 +15,74 @@ sed -i '/DEPENDS+/ s/$/ +wsdd2/' `find package/ -follow -type f -path '*/ksmbd-t
 sed -i 's/ +ntfs-3g/ +ntfs3-mount/' `find package/ -follow -type f -path '*/automount/Makefile'`
 sed -i '/skip\=/ a skip=`mount | grep -q /dev/$device; echo $?`' `find package/ -follow -type f -path */automount/files/15-automount`
 
-if [ $DEVICE = 'x86' ]; then
-  sed -i 's/kmod-i40evf//' target/linux/x86/Makefile
-fi
+mkdir `find package/ -follow -type d -path '*/pdnsd-alt'`/patches
+mv patches/99-disallow-aaaa.patch `find package/ -follow -type d -path '*/pdnsd-alt'`/patches
 
-if [ $DEVICE = 'r2s' -o $DEVICE = 'r2c' ]; then
-  sed -i 's/1400000/1450000/' target/linux/rockchip/patches-5.4/991-arm64-dts-rockchip-add-more-cpu-operating-points-for.patch
+if [ $DEVICE != 'r1s' ]; then
+
+  # remove non-exist package from x86 profile
+  sed -i 's/kmod-i40evf//' target/linux/x86/Makefile
+
+  # enable r2s oled plugin by default
   sed -i "s/enable '0'/enable '1'/" `find package/ -follow -type f -path '*/luci-app-oled/root/etc/config/oled'`
+
+  # swap the network adapter driver to r8168 to gain better performance for r4s
+  sed -i 's/r8169/r8168/' target/linux/rockchip/image/armv8.mk
+
+  # change the voltage value for over-clock stablization
+  sed -i 's/1400000/1450000/' target/linux/rockchip/patches-5.4/991-arm64-dts-rockchip-add-more-cpu-operating-points-for.patch
   config_file_cpufreq=`find package/ -follow -type f -path '*/luci-app-cpufreq/root/etc/config/cpufreq'`
   truncate -s-1 $config_file_cpufreq
   echo -e "\toption governor0 'schedutil'" >> $config_file_cpufreq
   echo -e "\toption minfreq0 '816000'" >> $config_file_cpufreq
   echo -e "\toption maxfreq0 '1512000'\n" >> $config_file_cpufreq
-fi
 
-if [ $DEVICE = 'r4s' ]; then
-    sed -i 's/r8169/r8168/' target/linux/rockchip/image/armv8.mk
-fi
-
-if [[ $DEVICE =~ ('r2s'|'r2c'|'r4s'|'r1p') ]]; then
+  # enable the gpu for device 'r2s'|'r2c'|'r4s'|'r1p'
   wget https://github.com/coolsnowwolf/lede/raw/757e42d70727fe6b937bb31794a9ad4f5ce98081/target/linux/rockchip/config-default -NP target/linux/rockchip/
   wget https://github.com/coolsnowwolf/lede/commit/f341ef96fe4b509a728ba1281281da96bac23673.patch
   git apply f341ef96fe4b509a728ba1281281da96bac23673.patch
   rm f341ef96fe4b509a728ba1281281da96bac23673.patch
+
+  # bring the ethinfo back
+  cd package/emortal/autocore/files/x86
+  cp rpcd_luci rpcd_10_system.js rpcd_luci-mod-status.json ../arm
+  cd -
+  mf_autcore=`find package/ -path '*/autocore/Makefile'`
+  sed -i '/arm\/cpuinfo/a\\t$(INSTALL_DATA) ./files/x86/rpcd_21_ethinfo.js $(1)/www/luci-static/resources/view/status/include/21_ethinfo.js' $mf_autcore
+  sed -i '/arm\/cpuinfo/a\\t$(INSTALL_DIR) $(1)/www/luci-static/resources/view/status/include' $mf_autcore
+  sed -i '/arm\/cpuinfo/a\\t$(INSTALL_BIN) ./files/x86/ethinfo $(1)/sbin/ethinfo' $mf_autcore
+
+  # inject the firmware version
+  strDate=`TZ=UTC-8 date +%Y-%m-%d`
+  status_pages=`find package/ -follow -type f \( -path '*/autocore/files/arm/index.htm' -o -path '*/autocore/files/x86/index.htm' -o -path '*/autocore/files/arm/rpcd_10_system.js' -o -path '*/autocore/files/x86/rpcd_10_system.js' \)`
+  for status_page in $status_pages; do
+  case $status_page in
+    *htm)
+      line_number_FV=`grep -n 'Firmware Version' $status_page | cut -d: -f 1`
+      sed -i '/ver\./d' $status_page
+      sed -i $line_number_FV' a <a href="https://github.com/klever1988/nanopi-openwrt" target="_blank">klever1988/nanopi-openwrt</a> '$strDate $status_page
+      ;;
+    *js)
+      line_number_FV=`grep -m1 -n 'corelink' $status_page | cut -d: -f1`
+      sed -i $line_number_FV' i var pfv = document.createElement('\''placeholder'\'');pfv.innerHTML = '\''<a href="https://github.com/klever1988/nanopi-openwrt" target="_blank">klever1988/nanopi-openwrt</a> '$strDate"';" $status_page
+      line_number_FV=`grep -n 'Firmware Version' $status_page | cut -d : -f 1`
+      sed -i '/Firmware Version/d' $status_page
+      sed -i $line_number_FV' a _('\''Firmware Version'\''), pfv,' $status_page
+      ;;
+  esac
+  done
+
 fi
 
-#inject the firmware version
-strDate=`TZ=UTC-8 date +%Y-%m-%d`
-status_pages=`find package/ -follow -type f \( -path '*/autocore/files/arm/index.htm' -o -path '*/autocore/files/x86/index.htm' -o -path '*/autocore/files/arm/rpcd_10_system.js' -o -path '*/autocore/files/x86/rpcd_10_system.js' \)`
-for status_page in $status_pages; do
-case $status_page in
-  *htm)
-    line_number_FV=`grep -n 'Firmware Version' $status_page | cut -d: -f 1`
-    sed -i '/ver\./d' $status_page
-    sed -i $line_number_FV' a <a href="https://github.com/klever1988/nanopi-openwrt" target="_blank">klever1988/nanopi-openwrt</a> '$strDate $status_page
-    ;;
-  *js)
-    line_number_FV=`grep -m1 -n 'corelink' $status_page | cut -d: -f1`
-    sed -i $line_number_FV' i var pfv = document.createElement('\''placeholder'\'');pfv.innerHTML = '\''<a href="https://github.com/klever1988/nanopi-openwrt" target="_blank">klever1988/nanopi-openwrt</a> '$strDate"';" $status_page
-    line_number_FV=`grep -n 'Firmware Version' $status_page | cut -d : -f 1`
-    sed -i '/Firmware Version/d' $status_page
-    sed -i $line_number_FV' a _('\''Firmware Version'\''), pfv,' $status_page
-    ;;
-esac
-done
-
-#fix argon css
+# little optimization argon css
 css_file=`find package/ -follow -type f -path '*/argon/css/cascade.css'`
 line_number_h6=`grep -m1 -n 'h6 {' $css_file | cut -d: -f1`
 if [[ ! -z "$line_number_h6" ]]; then
 sed -i $line_number_h6',+10 s/font-weight: normal/font-weight: bold/' $css_file
 fi
 
-#set default theme to argon
-sed -i '/uci commit luci/i\uci set luci.main.mediaurlbase="/luci-static/argon"' `find package -type f -path '*/default-settings/files/zzz-default-settings'`
+# set default theme to openwrt2020
+sed -i '/uci commit luci/i\uci set luci.main.mediaurlbase="/luci-static/openwrt2020"' `find package -type f -path '*/default-settings/files/zzz-default-settings'`
 
-#bring the ethinfo back
-if [ $DEVICE != 'r1s' ]; then
-cd package/emortal/autocore/files/x86
-cp rpcd_luci rpcd_10_system.js rpcd_luci-mod-status.json ../arm
-cd -
-mf_autcore=`find package/ -path '*/autocore/Makefile'`
-sed -i '/arm\/cpuinfo/a\\t$(INSTALL_DATA) ./files/x86/rpcd_21_ethinfo.js $(1)/www/luci-static/resources/view/status/include/21_ethinfo.js' $mf_autcore
-sed -i '/arm\/cpuinfo/a\\t$(INSTALL_DIR) $(1)/www/luci-static/resources/view/status/include' $mf_autcore
-sed -i '/arm\/cpuinfo/a\\t$(INSTALL_BIN) ./files/x86/ethinfo $(1)/sbin/ethinfo' $mf_autcore
-fi
-
-#remove the mirros from cn
+# remove the mirros from cn
 sed -i '/182.140.223.146/d;/\.cn\//d;/tencent/d' scripts/download.pl
\ No newline at end of file