diff --git a/V2rayNG/app/src/main/java/com/v2ray/ang/dto/ProfileItem.kt b/V2rayNG/app/src/main/java/com/v2ray/ang/dto/ProfileItem.kt
index 4dd19c8f..0e6f577c 100644
--- a/V2rayNG/app/src/main/java/com/v2ray/ang/dto/ProfileItem.kt
+++ b/V2rayNG/app/src/main/java/com/v2ray/ang/dto/ProfileItem.kt
@@ -42,6 +42,7 @@ data class ProfileItem(
     var insecure: Boolean? = null,
     var echConfigList: String? = null,
     var echForceQuery: String? = null,
+    var pinnedCA256: String? = null,
 
     var publicKey: String? = null,
     var shortId: String? = null,
diff --git a/V2rayNG/app/src/main/java/com/v2ray/ang/dto/V2rayConfig.kt b/V2rayNG/app/src/main/java/com/v2ray/ang/dto/V2rayConfig.kt
index 4affbaa8..9455e58e 100644
--- a/V2rayNG/app/src/main/java/com/v2ray/ang/dto/V2rayConfig.kt
+++ b/V2rayNG/app/src/main/java/com/v2ray/ang/dto/V2rayConfig.kt
@@ -271,6 +271,7 @@ data class V2rayConfig(
                 val enableSessionResumption: Boolean? = null,
                 var echConfigList: String? = null,
                 var echForceQuery: String? = null,
+                var pinnedPeerCertSha256: String? = null,
                 // REALITY settings
                 val show: Boolean = false,
                 var publicKey: String? = null,
diff --git a/V2rayNG/app/src/main/java/com/v2ray/ang/extension/_Ext.kt b/V2rayNG/app/src/main/java/com/v2ray/ang/extension/_Ext.kt
index 75e60923..c78661ca 100644
--- a/V2rayNG/app/src/main/java/com/v2ray/ang/extension/_Ext.kt
+++ b/V2rayNG/app/src/main/java/com/v2ray/ang/extension/_Ext.kt
@@ -11,6 +11,7 @@ import com.v2ray.ang.AngApplication
 import es.dmoral.toasty.Toasty
 import java.io.Serializable
 import java.net.URI
+import java.util.Locale
 
 val Context.v2RayApplication: AngApplication?
     get() = applicationContext as? AngApplication
@@ -92,7 +93,7 @@ fun Long.toTrafficString(): String {
         size /= DIVISOR
         unitIndex++
     }
-    return String.format("%.1f %s", size, units[unitIndex])
+    return String.format(Locale.getDefault(), "%.1f %s", size, units[unitIndex])
 }
 
 val URI.idnHost: String
@@ -105,6 +106,13 @@ val URI.idnHost: String
  */
 fun String?.removeWhiteSpace(): String? = this?.replace(" ", "")
 
+/**
+ * Returns null if the string is null or blank, otherwise returns the string itself.
+ *
+ * @return The string or null.
+ */
+fun String?.nullIfBlank(): String? = this?.takeIf { it.isNotBlank() }
+
 /**
  * Converts the string to a Long value, or returns 0 if the conversion fails.
  *
diff --git a/V2rayNG/app/src/main/java/com/v2ray/ang/fmt/FmtBase.kt b/V2rayNG/app/src/main/java/com/v2ray/ang/fmt/FmtBase.kt
index 6d1fb4d3..97357cb4 100644
--- a/V2rayNG/app/src/main/java/com/v2ray/ang/fmt/FmtBase.kt
+++ b/V2rayNG/app/src/main/java/com/v2ray/ang/fmt/FmtBase.kt
@@ -83,6 +83,7 @@ open class FmtBase {
         config.fingerPrint = queryParam["fp"]
         config.alpn = queryParam["alpn"]
         config.echConfigList = queryParam["ech"]
+        config.pinnedCA256 = queryParam["pcs"]
         config.publicKey = queryParam["pbk"]
         config.shortId = queryParam["sid"]
         config.spiderX = queryParam["spx"]
@@ -102,6 +103,7 @@ open class FmtBase {
         config.sni.let { if (it.isNotNullEmpty()) dicQuery["sni"] = it.orEmpty() }
         config.alpn.let { if (it.isNotNullEmpty()) dicQuery["alpn"] = it.orEmpty() }
         config.echConfigList.let { if (it.isNotNullEmpty()) dicQuery["ech"] = it.orEmpty() }
+        config.pinnedCA256.let { if (it.isNotNullEmpty()) dicQuery["pcs"] = it.orEmpty() }
         config.fingerPrint.let { if (it.isNotNullEmpty()) dicQuery["fp"] = it.orEmpty() }
         config.publicKey.let { if (it.isNotNullEmpty()) dicQuery["pbk"] = it.orEmpty() }
         config.shortId.let { if (it.isNotNullEmpty()) dicQuery["sid"] = it.orEmpty() }
diff --git a/V2rayNG/app/src/main/java/com/v2ray/ang/handler/V2rayConfigManager.kt b/V2rayNG/app/src/main/java/com/v2ray/ang/handler/V2rayConfigManager.kt
index e97b6c56..6ec3eac7 100644
--- a/V2rayNG/app/src/main/java/com/v2ray/ang/handler/V2rayConfigManager.kt
+++ b/V2rayNG/app/src/main/java/com/v2ray/ang/handler/V2rayConfigManager.kt
@@ -16,6 +16,7 @@ import com.v2ray.ang.dto.V2rayConfig.OutboundBean.OutSettingsBean
 import com.v2ray.ang.dto.V2rayConfig.OutboundBean.StreamSettingsBean
 import com.v2ray.ang.dto.V2rayConfig.RoutingBean.RulesBean
 import com.v2ray.ang.extension.isNotNullEmpty
+import com.v2ray.ang.extension.nullIfBlank
 import com.v2ray.ang.fmt.HttpFmt
 import com.v2ray.ang.fmt.Hysteria2Fmt
 import com.v2ray.ang.fmt.ShadowsocksFmt
@@ -1314,6 +1315,7 @@ object V2rayConfigManager {
             alpn = if (alpns.isNullOrEmpty()) null else alpns.split(",").map { it.trim() }.filter { it.isNotEmpty() },
             echConfigList = if (echConfigList.isNullOrEmpty()) null else echConfigList,
             echForceQuery = if (echForceQuery.isNullOrEmpty()) null else echForceQuery,
+            pinnedPeerCertSha256 = profileItem.pinnedCA256?.nullIfBlank(),
             publicKey = if (publicKey.isNullOrEmpty()) null else publicKey,
             shortId = if (shortId.isNullOrEmpty()) null else shortId,
             spiderX = if (spiderX.isNullOrEmpty()) null else spiderX,
diff --git a/V2rayNG/app/src/main/java/com/v2ray/ang/ui/ServerActivity.kt b/V2rayNG/app/src/main/java/com/v2ray/ang/ui/ServerActivity.kt
index 7614f19a..8852f972 100644
--- a/V2rayNG/app/src/main/java/com/v2ray/ang/ui/ServerActivity.kt
+++ b/V2rayNG/app/src/main/java/com/v2ray/ang/ui/ServerActivity.kt
@@ -137,6 +137,8 @@ class ServerActivity : BaseActivity() {
     private val container_ech_config_list: LinearLayout? by lazy { findViewById(R.id.lay_ech_config_list) }
     private val sp_ech_force_query: Spinner? by lazy { findViewById(R.id.sp_ech_force_query) }
     private val container_ech_force_query: LinearLayout? by lazy { findViewById(R.id.lay_ech_force_query) }
+    private val et_pinned_ca256: EditText? by lazy { findViewById(R.id.et_pinned_ca256) }
+    private val container_pinned_ca256: LinearLayout? by lazy { findViewById(R.id.lay_pinned_ca256) }
 
 
     override fun onCreate(savedInstanceState: Bundle?) {
@@ -274,7 +276,8 @@ class ServerActivity : BaseActivity() {
                             container_spider_x,
                             container_mldsa65_verify,
                             container_ech_config_list,
-                            container_ech_force_query
+                            container_ech_force_query,
+                            container_pinned_ca256
                         ).forEach { it?.visibility = View.GONE }
                     }
 
@@ -286,7 +289,8 @@ class ServerActivity : BaseActivity() {
                             container_alpn,
                             container_allow_insecure,
                             container_ech_config_list,
-                            container_ech_force_query
+                            container_ech_force_query,
+                            container_pinned_ca256
                         ).forEach { it?.visibility = View.VISIBLE }
                         listOf(
                             container_public_key,
@@ -306,7 +310,8 @@ class ServerActivity : BaseActivity() {
                             container_alpn,
                             container_allow_insecure,
                             container_ech_config_list,
-                            container_ech_force_query
+                            container_ech_force_query,
+                            container_pinned_ca256
                         ).forEach { it?.visibility = View.GONE }
                         listOf(
                             container_public_key,
@@ -394,6 +399,7 @@ class ServerActivity : BaseActivity() {
                     val index = Utils.arrayFind(echForceQuerys, it)
                     index.let { sp_ech_force_query?.setSelection(if (it >= 0) it else 0) }
                 }
+                et_pinned_ca256?.text = Utils.getEditable(config.pinnedCA256)
             } else if (config.security == REALITY) {
                 et_public_key?.text = Utils.getEditable(config.publicKey.orEmpty())
                 et_short_id?.text = Utils.getEditable(config.shortId.orEmpty())
@@ -566,6 +572,7 @@ class ServerActivity : BaseActivity() {
         val mldsa65Verify = et_mldsa65_verify?.text?.toString()
         val echConfigList = et_ech_config_list?.text?.toString()
         val echForceQueryIndex = sp_ech_force_query?.selectedItemPosition ?: 0
+        val pinnedCA256 = et_pinned_ca256?.text?.toString()
 
         val allowInsecure =
             if (allowInsecureField == null || allowinsecures[allowInsecureField].isBlank()) {
@@ -585,6 +592,7 @@ class ServerActivity : BaseActivity() {
         config.mldsa65Verify = mldsa65Verify
         config.echConfigList = echConfigList
         config.echForceQuery = echForceQuerys[echForceQueryIndex]
+        config.pinnedCA256 = pinnedCA256
     }
 
     private fun transportTypes(network: String?): Array<out String> {
diff --git a/V2rayNG/app/src/main/res/layout/layout_tls.xml b/V2rayNG/app/src/main/res/layout/layout_tls.xml
index c75a79f0..15de8788 100644
--- a/V2rayNG/app/src/main/res/layout/layout_tls.xml
+++ b/V2rayNG/app/src/main/res/layout/layout_tls.xml
@@ -158,6 +158,27 @@
             android:entries="@array/ech_force_query_value" />
     </LinearLayout>
 
+    <LinearLayout
+        android:id="@+id/lay_pinned_ca256"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:layout_marginBottom="@dimen/padding_spacing_dp16"
+        android:orientation="vertical">
+
+        <TextView
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:text="@string/server_lab_pinned_ca256" />
+
+        <EditText
+            android:id="@+id/et_pinned_ca256"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:inputType="text"
+            android:nextFocusDown="@+id/sp_ech_force_query" />
+
+    </LinearLayout>
+
     <LinearLayout
         android:id="@+id/lay_public_key"
         android:layout_width="match_parent"
diff --git a/V2rayNG/app/src/main/res/values-ar/strings.xml b/V2rayNG/app/src/main/res/values-ar/strings.xml
index 19886afe..93f65389 100644
--- a/V2rayNG/app/src/main/res/values-ar/strings.xml
+++ b/V2rayNG/app/src/main/res/values-ar/strings.xml
@@ -116,6 +116,7 @@
     <string name="server_lab_xhttp_extra">XHTTP Extra raw JSON, format: { XHTTPObject }</string>
     <string name="server_lab_ech_config_list">EchConfigList</string>
     <string name="server_lab_ech_force_query">EchForceQuery</string>
+    <string name="server_lab_pinned_ca256">Certificate fingerprint (SHA-256)</string>
 
     <!-- UserAssetActivity -->
     <string name="toast_asset_copy_failed">فشل نسخ الملف، يرجى استخدام مدير الملفات</string>
diff --git a/V2rayNG/app/src/main/res/values-bn/strings.xml b/V2rayNG/app/src/main/res/values-bn/strings.xml
index c1a4e5bd..b72b0f30 100644
--- a/V2rayNG/app/src/main/res/values-bn/strings.xml
+++ b/V2rayNG/app/src/main/res/values-bn/strings.xml
@@ -115,6 +115,7 @@
     <string name="server_lab_xhttp_extra">XHTTP Extra raw JSON, format: { XHTTPObject }</string>
     <string name="server_lab_ech_config_list">EchConfigList</string>
     <string name="server_lab_ech_force_query">EchForceQuery</string>
+    <string name="server_lab_pinned_ca256">Certificate fingerprint (SHA-256)</string>
 
     <!-- UserAssetActivity -->
     <string name="toast_asset_copy_failed">ফাইল কপি ব্যর্থ, অনুগ্রহ করে ফাইল ম্যানেজার ব্যবহার করুন</string>
diff --git a/V2rayNG/app/src/main/res/values-bqi-rIR/strings.xml b/V2rayNG/app/src/main/res/values-bqi-rIR/strings.xml
index 125ed7e1..a804cacc 100644
--- a/V2rayNG/app/src/main/res/values-bqi-rIR/strings.xml
+++ b/V2rayNG/app/src/main/res/values-bqi-rIR/strings.xml
@@ -115,6 +115,7 @@
     <string name="server_lab_xhttp_extra">XHTTP Extra خام JSON، قالوو: { XHTTPObject }</string>
     <string name="server_lab_ech_config_list">نومگه کانفیگ Ech</string>
     <string name="server_lab_ech_force_query">پورس وو جۊ اجباری Ech</string>
+    <string name="server_lab_pinned_ca256">Certificate fingerprint (SHA-256)</string>
 
     <!-- UserAssetActivity -->
     <string name="toast_asset_copy_failed">لف گیری فایل ٱنجوم نوابی، ز ی برنومه دؽوۉداری فایل هیاری بگرین</string>
diff --git a/V2rayNG/app/src/main/res/values-fa/strings.xml b/V2rayNG/app/src/main/res/values-fa/strings.xml
index 78907e13..4f356a91 100644
--- a/V2rayNG/app/src/main/res/values-fa/strings.xml
+++ b/V2rayNG/app/src/main/res/values-fa/strings.xml
@@ -115,6 +115,7 @@
     <string name="server_lab_xhttp_extra">خام JSON XHTTP Extra، قالب: { XHTTPObject }</string>
     <string name="server_lab_ech_config_list">لیست کانفیگ Ech</string>
     <string name="server_lab_ech_force_query">EchForceQuery</string>
+    <string name="server_lab_pinned_ca256">Certificate fingerprint (SHA-256)</string>
 
     <!-- UserAssetActivity -->
     <string name="toast_asset_copy_failed">کپی فایل انجام نشد، لطفا از برنامه مدیریت فایل استفاده کنید</string>
diff --git a/V2rayNG/app/src/main/res/values-ru/strings.xml b/V2rayNG/app/src/main/res/values-ru/strings.xml
index 0c71cccc..47f8a270 100644
--- a/V2rayNG/app/src/main/res/values-ru/strings.xml
+++ b/V2rayNG/app/src/main/res/values-ru/strings.xml
@@ -115,6 +115,7 @@
     <string name="server_lab_xhttp_extra">Необработанный JSON XHTTP Extra, формат: { XHTTPObject }</string>
     <string name="server_lab_ech_config_list">EchConfigList</string>
     <string name="server_lab_ech_force_query">EchForceQuery</string>
+    <string name="server_lab_pinned_ca256">Certificate fingerprint (SHA-256)</string>
 
     <!-- UserAssetActivity -->
     <string name="toast_asset_copy_failed">Невозможно скопировать файл, используйте файловый менеджер</string>
diff --git a/V2rayNG/app/src/main/res/values-vi/strings.xml b/V2rayNG/app/src/main/res/values-vi/strings.xml
index 23288c23..0b62575f 100644
--- a/V2rayNG/app/src/main/res/values-vi/strings.xml
+++ b/V2rayNG/app/src/main/res/values-vi/strings.xml
@@ -115,6 +115,7 @@
     <string name="server_lab_xhttp_extra">XHTTP Extra raw JSON, format: { XHTTPObject }</string>
     <string name="server_lab_ech_config_list">EchConfigList</string>
     <string name="server_lab_ech_force_query">EchForceQuery</string>
+    <string name="server_lab_pinned_ca256">Certificate fingerprint (SHA-256)</string>
 
     <!-- UserAssetActivity -->
     <string name="toast_asset_copy_failed">Không thể sao chép tệp tin, hãy dùng trình quản lý tệp!</string>
diff --git a/V2rayNG/app/src/main/res/values-zh-rCN/strings.xml b/V2rayNG/app/src/main/res/values-zh-rCN/strings.xml
index c9e2dbc5..18f2044b 100644
--- a/V2rayNG/app/src/main/res/values-zh-rCN/strings.xml
+++ b/V2rayNG/app/src/main/res/values-zh-rCN/strings.xml
@@ -115,6 +115,7 @@
     <string name="server_lab_xhttp_extra">XHTTP Extra 原始 JSON，格式： { XHTTPObject }</string>
     <string name="server_lab_ech_config_list">EchConfigList</string>
     <string name="server_lab_ech_force_query">EchForceQuery</string>
+    <string name="server_lab_pinned_ca256">证书指纹 (SHA-256)</string>
 
     <!-- UserAssetActivity -->
     <string name="toast_asset_copy_failed">失败, 请使用文件管理器</string>
diff --git a/V2rayNG/app/src/main/res/values-zh-rTW/strings.xml b/V2rayNG/app/src/main/res/values-zh-rTW/strings.xml
index 09e67bef..ffc1ab00 100644
--- a/V2rayNG/app/src/main/res/values-zh-rTW/strings.xml
+++ b/V2rayNG/app/src/main/res/values-zh-rTW/strings.xml
@@ -115,6 +115,7 @@
     <string name="server_lab_xhttp_extra">XHTTP Extra 原始 JSON，格式： { XHTTPObject }</string>
     <string name="server_lab_ech_config_list">EchConfigList</string>
     <string name="server_lab_ech_force_query">EchForceQuery</string>
+    <string name="server_lab_pinned_ca256">證書指紋 (SHA-256)</string>
 
     <!-- UserAssetActivity -->
     <string name="toast_asset_copy_failed">失敗，請使用檔案總管</string>
diff --git a/V2rayNG/app/src/main/res/values/strings.xml b/V2rayNG/app/src/main/res/values/strings.xml
index 7e380bcd..561ad994 100644
--- a/V2rayNG/app/src/main/res/values/strings.xml
+++ b/V2rayNG/app/src/main/res/values/strings.xml
@@ -116,6 +116,7 @@
     <string name="server_lab_xhttp_extra">XHTTP Extra raw JSON, format: { XHTTPObject }</string>
     <string name="server_lab_ech_config_list">EchConfigList</string>
     <string name="server_lab_ech_force_query">EchForceQuery</string>
+    <string name="server_lab_pinned_ca256">Certificate fingerprint (SHA-256)</string>
 
     <!-- UserAssetActivity -->
     <string name="toast_asset_copy_failed">File copy failed, please use File Manager</string>