diff --git a/edxp-core/template_override/customize.sh b/edxp-core/template_override/customize.sh
index d7724cf2..3997d7f6 100644
--- a/edxp-core/template_override/customize.sh
+++ b/edxp-core/template_override/customize.sh
@@ -100,6 +100,8 @@ LANG_UTIL_ERR_ANDROID_UNSUPPORT_1="Unsupported Android version"
 LANG_UTIL_ERR_ANDROID_UNSUPPORT_2="(below Oreo)"
 LANG_UTIL_ERR_ANDROID_UNSUPPORT_3="Learn more from our GitHub Wiki"
 LANG_UTIL_ERR_PLATFORM_UNSUPPORT="Unsupported platform"
+LANG_UTIL_ERR_VARIANT_SELECTION="Error occurred when selecting variant"
+LANG_UTIL_ERR_VARIANT_UNSUPPORT="Unsupported variant"
 LANG_UTIL_ERR_DUPINST_1="Duplicate installation is now allowed"
 LANG_UTIL_ERR_DUPINST_2="Remove"
 LANG_UTIL_ERR_DUPINST_3="and reboot to install again"
@@ -136,6 +138,29 @@ check_magisk_version
 check_riru_version
 edxp_check_architecture
 
+# determinate variant
+if [ "${ARCH}" == "arm" ]; then
+  BIN_PATH="system/bin"
+elif [ "${ARCH}" == "arm64" ]; then
+  BIN_PATH="system/bin64"
+elif [ "${ARCH}" == "x86" ]; then
+  BIN_PATH="system_x86/bin"
+elif [ "${ARCH}" == "x64" ]; then
+  BIN_PATH="system_x86/bin64"
+else
+  # unreachable
+  abortC "${LANG_UTIL_ERR_PLATFORM_UNSUPPORT}"
+fi
+
+extract "${ZIPFILE}" "${BIN_PATH}/key_selector" "${TMPDIR}"
+SELECTOR_PATH="${TMPDIR}/${BIN_PATH}/key_selector"
+chmod 755 "${SELECTOR_PATH}"
+"${SELECTOR_PATH}"
+VARIANT=$?
+if [ VARIANT -lt 16 ]; then
+  abortC "${LANG_UTIL_ERR_VARIANT_SELECTION}"
+fi
+
 ui_print "- ${LANG_CUST_INST_EXT_FILES}"
 
 # extract module files
@@ -210,8 +235,14 @@ mkdir -p /data/misc/$MISC_PATH/0/conf/ || abortC "! ${LANG_CUST_ERR_CONF_CREATE}
 set_perm /data/misc/$MISC_PATH root root 0771 "u:object_r:magisk_file:s0" || abortC "! ${LANG_CUST_ERR_PERM}"
 echo "[[ -f /data/adb/edxp/keep_data ]] || rm -rf /data/misc/$MISC_PATH" >> "${MODPATH}/uninstall.sh" || abortC "! ${LANG_CUST_ERR_CONF_UNINST}"
 echo "[[ -f /data/adb/edxp/new_install ]] || rm -rf /data/adb/edxp" >> "${MODPATH}/uninstall.sh" || abortC "! ${LANG_CUST_ERR_CONF_UNINST}"
-# TODO: let user select variant
-echo "1" > /data/misc/$MISC_PATH/variant
+
+if [ $VARIANT == 17 ]; then
+  echo "1" > /data/misc/$MISC_PATH/variant
+elif [ $VARIANT == 18 ]; then
+  echo "2" > /data/misc/$MISC_PATH/variant
+else
+  abortC "${LANG_UTIL_ERR_VARIANT_UNSUPPORT} ${VARIANT}"
+fi
 
 ui_print "- ${LANG_CUST_INST_COPY_LIB}"
 
diff --git a/edxp-core/template_override/zh_CN.sh b/edxp-core/template_override/zh_CN.sh
index 30688850..951cc028 100644
--- a/edxp-core/template_override/zh_CN.sh
+++ b/edxp-core/template_override/zh_CN.sh
@@ -47,6 +47,8 @@ LANG_UTIL_ERR_ANDROID_UNSUPPORT_1="不支持的 Android 版本"
 LANG_UTIL_ERR_ANDROID_UNSUPPORT_2="(Oreo 以下版本)"
 LANG_UTIL_ERR_ANDROID_UNSUPPORT_3="从我们的 GitHub Wiki 中了解更多"
 LANG_UTIL_ERR_PLATFORM_UNSUPPORT="不支持的设备平台"
+LANG_UTIL_ERR_VARIANT_SELECTION="选择变种时出现错误"
+LANG_UTIL_ERR_VARIANT_UNSUPPORT="不支持的变种"
 LANG_UTIL_ERR_DUPINST_1="不允许重复安装"
 LANG_UTIL_ERR_DUPINST_2="删除"
 LANG_UTIL_ERR_DUPINST_3="并重启以继续安装"
diff --git a/key-selector/build.gradle b/key-selector/build.gradle
index b3b8d2d7..eccfe352 100644
--- a/key-selector/build.gradle
+++ b/key-selector/build.gradle
@@ -47,6 +47,7 @@ afterEvaluate {
         def variantNameLowered = variant.name.toLowerCase()
 
         task("copyKeySelector${variantNameCapped}LibraryToMagiskTemplate") {
+            dependsOn tasks.getByName("assemble${variantNameCapped}")
             def libPathRelease = "${buildDir}/intermediates/cmake/${variantNameLowered}/obj"
             doLast {
                 copy {
diff --git a/key-selector/src/main/cpp/Languages.h b/key-selector/src/main/cpp/Languages.h
new file mode 100644
index 00000000..f889a818
--- /dev/null
+++ b/key-selector/src/main/cpp/Languages.h
@@ -0,0 +1,37 @@
+//
+// Created by 双草酸酯 on 1/26/21.
+//
+
+#ifndef EDXPOSED_LANGUAGES_H
+#define EDXPOSED_LANGUAGES_H
+#include <string>
+
+class Languages {
+public:
+    virtual const std::string desc_line_1() {
+        return "Select variant. Use Volume Down to move and Volume Up to confirm.";
+    }
+    virtual const std::string desc_line_2(int seconds) {
+        const char base[] = "The program will select YAHFA for you in %d seconds if you don't \nhave a physical volume button. ";
+        std::string out;
+        out.resize(sizeof(base) + 20);
+        sprintf(out.data(), base, seconds);
+        return out;
+    }
+};
+
+class LanguageChinese: public Languages {
+public:
+    const std::string desc_line_1() override {
+        return "请选择变种。使用音量减切换，音量加确定。";
+    }
+    const std::string desc_line_2(int seconds) override {
+        const char base[] = "如果您的设备没有音量键，本程序将会在 %d 秒后自动选择 YAHFA 。";
+        std::string out;
+        out.resize(sizeof(base) + 20);
+        sprintf(out.data(), base, seconds);
+        return out;
+    }
+};
+
+#endif //EDXPOSED_LANGUAGES_H
diff --git a/key-selector/src/main/cpp/key_selector.cpp b/key-selector/src/main/cpp/key_selector.cpp
index 7e31fe1c..5ace72b7 100644
--- a/key-selector/src/main/cpp/key_selector.cpp
+++ b/key-selector/src/main/cpp/key_selector.cpp
@@ -28,7 +28,9 @@
 #include <cerrno>
 #include <unistd.h>
 #include <stdexcept>
+#include <sys/system_properties.h>
 
+#include "Languages.h"
 #include "key_selector.h"
 
 // Global variables
@@ -260,16 +262,26 @@ int main() {
     const int cursor_max = SandHook;
 
     auto print_status = [&cursor](){
-        std::cout << "\33[2K\r"; // clear this line
+        //std::cout << "\33[2K\r"; // clear this line
         std::cout << "[";
         std::cout << (cursor == YAHFA ? "x" : " ");
         std::cout << "] YAHFA  [";
         std::cout << (cursor == SandHook ? "x" : " ");
-        std::cout << "] SandHook" << std::flush;
+        std::cout << "] SandHook" << std::endl;
     };
 
-    std::cout << "Select variant. Use Volume Down to move and Volume Up to confirm." << std::endl;
-    std::cout << "The program will select YAHFA for you in " << timeout << " seconds if you don't have a physical volume button. " << std::endl;
+    // languages
+    Languages* l;
+    char locale[256];
+    __system_property_get("persist.sys.locale", locale);
+    if (locale[0] == 'z' && locale[1] == 'h') {
+        l = new LanguageChinese();
+    } else {
+        l = new Languages();
+    }
+
+    std::cout << l->desc_line_1() << std::endl;
+    std::cout << l->desc_line_2(timeout) << std::endl;
     print_status();
     while (int event = get_event()) {
         bool leave = false;
@@ -287,12 +299,13 @@ int main() {
             default:
                 std::cout << "ERROR\n";
         }
-        print_status();
         if (leave) {
             break;
         }
+        print_status();
     }
 
     // std::cout << std::endl << cursor << std::endl;
+    delete l;
     return cursor;
 }
\ No newline at end of file