diff --git a/frontend/src/views/domain/cert/IssueCert.vue b/frontend/src/views/domain/cert/IssueCert.vue
index 38a57c4b..87ccfaa2 100644
--- a/frontend/src/views/domain/cert/IssueCert.vue
+++ b/frontend/src/views/domain/cert/IssueCert.vue
@@ -6,7 +6,6 @@ import domain from '@/api/domain'
 import websocket from '@/lib/websocket'
 import Template from '@/views/template/Template.vue'
 import template from '@/api/template'
-import _ from 'lodash'
 
 const {$gettext, interpolate} = useGettext()
 
@@ -35,7 +34,7 @@ function confirm() {
             $gettext('Do you want to enable auto-cert renewal?'),
         content: enabled.value ? $gettext('We need to add the HTTPChallenge configuration to ' +
                 'this file and reload the Nginx. Are you sure you want to continue?') :
-            $gettext('We will need to remove the HTTPChallenge configuration from this file and ' +
+            $gettext('We will remove the HTTPChallenge configuration from this file and ' +
                 'reload the Nginx configuration file. Are you sure you want to continue?'),
         mask: false,
         centered: true,
@@ -60,7 +59,10 @@ async function onchange(r: boolean) {
                 v.locations.push(...r.locations)
             })
         })
-        await save_site_config()
+        // if ssl_certificate is empty, do not save, just use the config from last step.
+        if (!props.directivesMap['ssl_certificate']?.[0]) {
+            await save_site_config()
+        }
         job()
     } else {
         await props.ngx_config.servers.forEach((v: any) => {
diff --git a/frontend/src/views/domain/ngx_conf/NgxConfigEditor.vue b/frontend/src/views/domain/ngx_conf/NgxConfigEditor.vue
index 3f487f32..4dcda748 100644
--- a/frontend/src/views/domain/ngx_conf/NgxConfigEditor.vue
+++ b/frontend/src/views/domain/ngx_conf/NgxConfigEditor.vue
@@ -1,7 +1,7 @@
 <script setup lang="ts">
 import DirectiveEditor from '@/views/domain/ngx_conf/directive/DirectiveEditor.vue'
 import LocationEditor from '@/views/domain/ngx_conf/LocationEditor.vue'
-import {computed, onMounted, ref, watch} from 'vue'
+import {computed, inject, onMounted, ref, watch} from 'vue'
 import {useRoute, useRouter} from 'vue-router'
 import {useGettext} from 'vue3-gettext'
 import Cert from '@/views/domain/cert/Cert.vue'
@@ -9,6 +9,8 @@ import LogEntry from '@/views/domain/ngx_conf/LogEntry.vue'
 import ConfigTemplate from '@/views/domain/ngx_conf/config_template/ConfigTemplate.vue'
 import CodeEditor from '@/components/CodeEditor/CodeEditor.vue'
 import {PlusOutlined} from '@ant-design/icons-vue'
+import {Modal} from 'ant-design-vue'
+import template from '@/api/template'
 
 const {$gettext} = useGettext()
 
@@ -16,11 +18,34 @@ const props = defineProps(['ngx_config', 'auto_cert', 'enabled', 'cert_info'])
 
 const emit = defineEmits(['callback', 'update:auto_cert'])
 
+const save_site_config: Function = inject('save_site_config')!
+
 const route = useRoute()
 
 const current_server_index = ref(0)
 const name = ref(route.params.name)
 
+function confirm_change_tls(r: boolean) {
+    Modal.confirm({
+        title: $gettext('Do you want to enable TLS?'),
+        content: $gettext('To make sure the certification auto-renewal can work normally, ' +
+            'we need to add a location which can proxy the request from authority to backend, ' +
+            'and we need to save this file and reload the Nginx. Are you sure you want to continue?'),
+        mask: false,
+        centered: true,
+        async onOk() {
+            await template.get_block('letsencrypt.conf').then(r => {
+                const first = props.ngx_config.servers[0]
+                first.locations = first.locations.filter((l: any) => l.path !== '/.well-known/acme-challenge')
+                first.locations.push(...r.locations)
+            })
+            await save_site_config()
+
+            change_tls(r)
+        }
+    })
+}
+
 function change_tls(r: any) {
     if (r) {
         // deep copy servers[0] to servers[1]
@@ -78,7 +103,7 @@ function change_tls(r: any) {
 }
 
 const current_server_directives = computed(() => {
-    return props.ngx_config.servers[current_server_index.value].directives
+    return props.ngx_config.servers?.[current_server_index.value]?.directives
 })
 
 const directivesMap = computed(() => {
@@ -170,7 +195,7 @@ function add_server() {
 <template>
     <div>
         <a-form-item :label="$gettext('Enable TLS')" v-if="!support_ssl">
-            <a-switch @change="change_tls"/>
+            <a-switch @change="confirm_change_tls"/>
         </a-form-item>
 
         <h2>{{ $gettext('Custom') }}</h2>
diff --git a/resources/development/nginx/sites-available/homework.jackyu.cn b/resources/development/nginx/sites-available/homework.jackyu.cn
index 0aab4c53..a48d2be1 100644
--- a/resources/development/nginx/sites-available/homework.jackyu.cn
+++ b/resources/development/nginx/sites-available/homework.jackyu.cn
@@ -2,7 +2,7 @@ server {
     listen 80;
     listen [::]:80;
     server_name homework.jackyu.cn;
-    #                               rewrite ^(.*)$  https://$host$1 permanent;
+    #                 rewrite ^(.*)$  https://$host$1 permanent;
     return 307 https://$server_name$request_uri;
     location /.well-known/acme-challenge {
         proxy_set_header Host $host;
@@ -17,58 +17,8 @@ server {
     server_name homework.jackyu.cn;
     ssl_certificate /etc/nginx/ssl/homework.jackyu.cn/fullchain.cer;
     ssl_certificate_key /etc/nginx/ssl/homework.jackyu.cn/private.key;
-    root /var/www/homework/frontend;
-    #                               Add index.php to the list if you are using PHP
-    index index.html;
-    location / {
-        # First attempt to serve request as file, then
-        # as directory, then fall back to displaying a 404.
-        index index.html;
-        try_files $uri $uri/ /index.html;
-    }
-    location /student {
-        index manage.html;
-        try_files $uri $uri/ /student.html;
-    }
-    location /teacher {
-        index manage.html;
-        try_files $uri $uri/ /teacher.html;
-    }
-    location /admin {
-        index admin.html;
-        try_files $uri $uri/ /admin.html;
-    }
-    location ^~/upload/ {
-        alias /var/www/homework/api/upload/;
-    }
-    location /api/ {
-        proxy_http_version 1.1;
-        proxy_set_header Upgrade $http_upgrade;
-        proxy_set_header Connection upgrade;
-        proxy_pass http://127.0.0.1:9008/;
-        proxy_redirect off;
-        proxy_set_header Host $host;
-        proxy_set_header X-Real-IP $remote_addr;
-        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
-        proxy_set_header X-Forwarded-Proto $scheme;
-        client_max_body_size 1000m;
-    }
-    location /zigbee-pi {
-        alias /var/www/zigbee-pi/frontend/;
-        index index.html;
-    }
-    location /zigbee-pi/api/ {
-        proxy_http_version 1.1;
-        proxy_set_header Upgrade $http_upgrade;
-        proxy_set_header Connection upgrade;
-        proxy_pass http://127.0.0.1:9200/;
-        proxy_redirect off;
-        proxy_set_header Host $host;
-        proxy_set_header X-Real-IP $remote_addr;
-        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
-        proxy_set_header X-Forwarded-Proto $scheme;
-        client_max_body_size 1000m;
-    }
+    #                 rewrite ^(.*)$  https://$host$1 permanent;
+    return 307 https://$server_name$request_uri;
     location /.well-known/acme-challenge {
         proxy_set_header Host $host;
         proxy_set_header X-Real_IP $remote_addr;
diff --git a/resources/development/nginx/ssl/homework.jackyu.cn/fullchain.cer b/resources/development/nginx/ssl/homework.jackyu.cn/fullchain.cer
index 7fed8c2e..a8ff177d 100644
--- a/resources/development/nginx/ssl/homework.jackyu.cn/fullchain.cer
+++ b/resources/development/nginx/ssl/homework.jackyu.cn/fullchain.cer
@@ -1,34 +1,34 @@
 -----BEGIN CERTIFICATE-----
-MIIFgDCCBGigAwIBAgITAP+fPvVk323vgnW668+CqRlK/TANBgkqhkiG9w0BAQsF
+MIIFgDCCBGigAwIBAgITAP+S8fcCshdBkwAQnMp96YTVgjANBgkqhkiG9w0BAQsF
 ADBDMQswCQYDVQQGEwJVUzESMBAGA1UEChMJZ29vZCBndXlzMSAwHgYDVQQDExdD
-QSBpbnRlcm1lZGlhdGUgKFJTQSkgQTAeFw0yMzA0MTAwMTQ0NDdaFw0yMzA3MDkw
-MTQ0NDZaMB0xGzAZBgNVBAMTEmhvbWV3b3JrLmphY2t5dS5jbjCCASIwDQYJKoZI
-hvcNAQEBBQADggEPADCCAQoCggEBALY1L0I/3MccefOKLhhh8OASsv4lKoBl0FbE
-lxuSN+hCcuW96wniv+ofCBZqHqYiRiYPB7JC3DrwP8iZepBMBf0FAnffrJJSr2Uk
-gotVoUqeNjIEmUir5dbsDrCaLQkMaXo2FUUDn74GcQjf7YG4BAUAkYQn7VJsn8+M
-W7NrMy22/NZHSfS0OHbF6F7qwVlOIW98h7PxXpqqYo1keOfRICfIalU4+0+Tb0VT
-MVr5oUSFuvlnJCrNTUtzgnvPLAmTfQ94RzMhwfxXMW1hD6KGaganoqrWYpJfZiWW
-zrNyNVubTulJZxzAaGZFqihoyfLhvbHKDCXb00H5tXQdecVA6GECAwEAAaOCApEw
+QSBpbnRlcm1lZGlhdGUgKFJTQSkgQTAeFw0yMzA0MTEwMjM0NDdaFw0yMzA3MTAw
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-u9/q94glVMqteOj0fiyaHuPZbyy/NeF/5KjLVZGfWypFDOHUpZn58FpAw33XQIxL
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-NKhxlKkKY7tAq43RAigiJjNdjFU=
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+wLfk+hSzwwA73NSZilfBNIMR9fg=
 -----END CERTIFICATE-----
 
 -----BEGIN CERTIFICATE-----
diff --git a/resources/development/nginx/ssl/homework.jackyu.cn/private.key b/resources/development/nginx/ssl/homework.jackyu.cn/private.key
index 8b183109..5e0002f2 100644
--- a/resources/development/nginx/ssl/homework.jackyu.cn/private.key
+++ b/resources/development/nginx/ssl/homework.jackyu.cn/private.key
@@ -1,27 +1,27 @@
 -----BEGIN RSA PRIVATE KEY-----
-MIIEpAIBAAKCAQEAtjUvQj/cxxx584ouGGHw4BKy/iUqgGXQVsSXG5I36EJy5b3r
-CeK/6h8IFmoepiJGJg8HskLcOvA/yJl6kEwF/QUCd9+sklKvZSSCi1WhSp42MgSZ
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+FsP0kSm0NgWVyyEX/jScECLtSBNT3kC4q+DKyxC1wqQrq0cSe6gd
 -----END RSA PRIVATE KEY-----