diff --git a/src/app/page.tsx b/src/app/page.tsx
index f288605..c729991 100644
--- a/src/app/page.tsx
+++ b/src/app/page.tsx
@@ -123,7 +123,7 @@ export default function Home() {
             onClick={actions.flashChineseFirmware}
             disabled={isRunning}
           >
-            Flash Chinese firmware (3.1.4)
+            Flash Chinese firmware (3.1.5)
           </Button>
           <Button
             variant="subtle"
diff --git a/src/esp/useEspOperations.ts b/src/esp/useEspOperations.ts
index 82f41b7..1d104e4 100644
--- a/src/esp/useEspOperations.ts
+++ b/src/esp/useEspOperations.ts
@@ -87,7 +87,7 @@ export function useEspOperations() {
   const flashEnglishFirmware = async () =>
     flashRemoteFirmware(() => getOfficialFirmware('3.1.1-EN'));
   const flashChineseFirmware = async () =>
-    flashRemoteFirmware(() => getOfficialFirmware('3.1.4-CH'));
+    flashRemoteFirmware(() => getOfficialFirmware('3.1.5-CH'));
   const flashCrossPointFirmware = async () =>
     flashRemoteFirmware(() => getCommunityFirmware('CrossPoint'));
 
diff --git a/src/remote/firmwareFetcher.ts b/src/remote/firmwareFetcher.ts
index 0232f42..64e6b78 100644
--- a/src/remote/firmwareFetcher.ts
+++ b/src/remote/firmwareFetcher.ts
@@ -3,8 +3,8 @@
 const officialFirmwareUrls = {
   '3.1.1-EN':
     'http://gotaserver.xteink.com/api/download/ESP32C3/V3.1.1/V3.1.1-EN.bin',
-  '3.1.4-CH':
-    'http://47.122.74.33:5000/api/download/ESP32C3/V3.1.4/V3.1.4-CH-X4.bin',
+  '3.1.5-CH':
+    'http://47.122.74.33:5000/api/download/ESP32C3/V3.1.5/V3.1.5_2-CH-X4.bin',
 };
 
 export async function getOfficialFirmware(