diff --git a/src/lib/launch.test.ts b/src/lib/launch.test.ts
index 15b57bb..ea270ca 100644
--- a/src/lib/launch.test.ts
+++ b/src/lib/launch.test.ts
@@ -46,6 +46,51 @@ describe('parseLaunchQuery', () => {
     expect(parseLaunchQuery({ scene: '/p/PREV9' }).prevId).toBe('PREV9')
   })
 
+  it('unpacks jump params stuffed into scene when & is encoded as %26', () => {
+    expect(
+      parseLaunchQuery({
+        scene:
+          '%2Fh%2FKZ9Q%26token=67738e89-4f74-4d9b-bdcc-1d30dc11f0fd%26host=nb.batiao8.com%26package=10044%26phone=17316703138',
+      })
+    ).toEqual({
+      token: '67738e89-4f74-4d9b-bdcc-1d30dc11f0fd',
+      host: 'nb.batiao8.com',
+      packageId: '10044',
+      scene: '/h/KZ9Q',
+      linkId: 'KZ9Q',
+      shareId: '',
+      prevId: '',
+      phone: '17316703138',
+    })
+  })
+
+  it('unpacks jump params after WeChat decodes %26 into &', () => {
+    expect(
+      parseLaunchQuery({
+        scene:
+          '/h/KZ9Q&token=67738e89-4f74-4d9b-bdcc-1d30dc11f0fd&host=nb.batiao8.com&package=10044&phone=17316703138',
+      })
+    ).toEqual({
+      token: '67738e89-4f74-4d9b-bdcc-1d30dc11f0fd',
+      host: 'nb.batiao8.com',
+      packageId: '10044',
+      scene: '/h/KZ9Q',
+      linkId: 'KZ9Q',
+      shareId: '',
+      prevId: '',
+      phone: '17316703138',
+    })
+  })
+
+  it('keeps explicit query fields over values stuffed into scene', () => {
+    expect(
+      parseLaunchQuery({
+        scene: '/h/KZ9Q&token=from-scene&phone=13800138000',
+        token: 'from-query',
+      }).token
+    ).toBe('from-query')
+  })
+
   it('ignores empty values', () => {
     expect(parseLaunchQuery({})).toEqual({
       token: '',
@@ -99,5 +144,23 @@ describe('resolveLaunchQuery', () => {
       phone: '',
     })
   })
+
+  it('uses stuffed scene params instead of scheme defaults', () => {
+    expect(
+      resolveLaunchQuery({
+        scene:
+          '/h/KZ9Q&token=h5-token&host=h5test.batiao8.com&package=20001&phone=17316703138',
+      })
+    ).toEqual({
+      token: 'h5-token',
+      host: 'h5test.batiao8.com',
+      packageId: '20001',
+      scene: '/h/KZ9Q',
+      linkId: 'KZ9Q',
+      shareId: '',
+      prevId: '',
+      phone: '17316703138',
+    })
+  })
 })
 
diff --git a/src/lib/launch.ts b/src/lib/launch.ts
index c92ca9b..ad8be2d 100644
--- a/src/lib/launch.ts
+++ b/src/lib/launch.ts
@@ -41,7 +41,7 @@ function safeDecode (value: string) {
 
 function parseSceneIds (scene: string) {
   const decoded = safeDecode(scene).trim()
-  const matched = decoded.match(/\/(h|s|p)\/([^/?#]+)/)
+  const matched = decoded.match(/\/(h|s|p)\/([^/?#&]+)/)
   if (!matched) {
     return { linkId: '', shareId: '', prevId: '' }
   }
@@ -52,14 +52,35 @@ function parseSceneIds (scene: string) {
   return { linkId: '', shareId: '', prevId: id }
 }
 
-export function parseLaunchQuery (raw: Record<string, string | undefined> = {}): LaunchQuery {
-  const scene = safeDecode(asText(raw.scene))
+function expandLaunchRaw (raw: Record<string, string | undefined> = {}) {
+  const scene = asText(raw.scene)
+  if (!scene) return raw
+
+  const decoded = safeDecode(scene).replace(/%26/gi, '&')
+  const amp = decoded.indexOf('&')
+  if (amp < 0) return raw
+
+  const extra: Record<string, string> = {}
+  new URLSearchParams(decoded.slice(amp + 1)).forEach((value, key) => {
+    extra[key] = value
+  })
+
   return {
-    token: asText(raw.token),
-    host: asText(raw.host),
-    packageId: asText(raw.package),
+    ...extra,
+    ...raw,
+    scene: decoded.slice(0, amp),
+  }
+}
+
+export function parseLaunchQuery (raw: Record<string, string | undefined> = {}): LaunchQuery {
+  const expanded = expandLaunchRaw(raw)
+  const scene = safeDecode(asText(expanded.scene))
+  return {
+    token: asText(expanded.token),
+    host: asText(expanded.host),
+    packageId: asText(expanded.package),
     scene,
-    phone: asText(raw.phone),
+    phone: asText(expanded.phone),
     ...parseSceneIds(scene),
   }
 }