优化地区检测逻辑 (#7020)

HMCL/src/main/java/org/jackhuang/hmcl/util/RegionUtils.java

@@ -40,9 +40,7 @@ public final class RegionUtils {
 
     /// Pre-check if the network is in China Mainland to avoid blocking the UI thread.
     public static void init() {
-        if (IS_CHINA_MAINLAND_MACHINE) {
-            Schedulers.io().execute(RegionUtils::isIsChinaMainlandNetwork);
-        }
+        Schedulers.io().execute(RegionUtils::isIsChinaMainlandNetwork);
     }
 
     private static final boolean IS_CHINA_MAINLAND_MACHINE = checkMachineIsChinaMainland();
@@ -75,6 +73,25 @@ public final class RegionUtils {
     private static volatile @Nullable Boolean isChinaMainlandNetwork;
 
     private static boolean checkChinaMainlandNetwork() {
+        if (!IS_CHINA_MAINLAND_MACHINE)
+            return false;
+
+        switch (ZoneId.systemDefault().getId()) {
+            case "Antarctica/Casey",
+                 "Asia/Hong_Kong",
+                 "Asia/Irkutsk",
+                 "Asia/Kuching",
+                 "Asia/Macau",
+                 "Asia/Makassar",
+                 "Asia/Manila",
+                 "Asia/Singapore",
+                 "Asia/Taipei",
+                 "Asia/Ulaanbaatar",
+                 "Australia/Perth" -> {
+                return false;
+            }
+        }
+
         @NotNullByDefault
         @JsonSerializable
         record IpWhoIsResponse(boolean success, String country_code) {
@@ -91,10 +108,6 @@ public final class RegionUtils {
     }
 
     public static boolean isIsChinaMainlandNetwork() {
-        if (!IS_CHINA_MAINLAND_MACHINE) {
-            return false;
-        }
-
         Boolean value = isChinaMainlandNetwork;
         if (value != null)
             return value;