diff --git a/internal/service/lingxian/app_provider.go b/internal/service/lingxian/app_provider.go
index c9fc42d..89c6745 100644
--- a/internal/service/lingxian/app_provider.go
+++ b/internal/service/lingxian/app_provider.go
@@ -288,7 +288,7 @@ func launchUID(cfg runtimeConfig, user gameprovider.AuthUser) string {
 }
 
 func launchToken(cfg runtimeConfig, user gameprovider.AuthUser) string {
-	return defaultIfBlank(cfg.TestToken, user.Token)
+	return trimTokenPadding(defaultIfBlank(cfg.TestToken, user.Token))
 }
 
 func launchRoomID(cfg runtimeConfig, req gameprovider.LaunchRequest) string {
@@ -307,6 +307,10 @@ func launchLang(req gameprovider.LaunchRequest) string {
 	return defaultLaunchLang
 }
 
+func trimTokenPadding(token string) string {
+	return strings.TrimRight(strings.TrimSpace(token), "=")
+}
+
 func launchSign(cfg runtimeConfig, gameID, uid, token, roomID string) string {
 	sum := md5.Sum([]byte(gameID + uid + token + roomID + strings.TrimSpace(cfg.AppKey)))
 	return hex.EncodeToString(sum[:])
diff --git a/internal/service/lingxian/catalog_test.go b/internal/service/lingxian/catalog_test.go
index bada20e..d2ce6c8 100644
--- a/internal/service/lingxian/catalog_test.go
+++ b/internal/service/lingxian/catalog_test.go
@@ -355,7 +355,7 @@ func TestAppProviderUsesHalfURLForHalfScreenGames(t *testing.T) {
 		Active:     true,
 		AppKey:     "test-key",
 		TestUID:    "test-uid",
-		TestToken:  "test-token",
+		TestToken:  "test-token==",
 		TestRoomID: "test-room",
 		CreateTime: now,
 		UpdateTime: now,
@@ -466,6 +466,9 @@ func TestAppProviderUsesHalfURLForHalfScreenGames(t *testing.T) {
 	if got := query.Get("token"); got != "test-token" {
 		t.Fatalf("query token = %q, want test-token", got)
 	}
+	if got := query.Get("sign"); got != launchSign(runtimeConfig{AppKey: "test-key"}, "1", "test-uid", "test-token", "test-room") {
+		t.Fatalf("query sign = %q, want sign with trimmed token", got)
+	}
 	if got := query.Get("lang"); got != defaultLaunchLang {
 		t.Fatalf("query lang = %q, want %s", got, defaultLaunchLang)
 	}
@@ -478,6 +481,9 @@ func TestAppProviderUsesHalfURLForHalfScreenGames(t *testing.T) {
 	if got := launch.LaunchConfig.(map[string]any)["roomid"]; got != "test-room" {
 		t.Fatalf("launchConfig.roomid = %v, want test-room", got)
 	}
+	if got := launch.LaunchConfig.(map[string]any)["token"]; got != "test-token" {
+		t.Fatalf("launchConfig.token = %v, want trimmed token", got)
+	}
 	if got := launch.LaunchConfig.(map[string]any)["lang"]; got != defaultLaunchLang {
 		t.Fatalf("launchConfig.lang = %v, want %s", got, defaultLaunchLang)
 	}