diff --git a/binding/c/Makefile b/binding/c/Makefile
index ea9523b..3031f3b 100644
--- a/binding/c/Makefile
+++ b/binding/c/Makefile
@@ -1,10 +1,10 @@
 all: xdb_searcher util_test
 
 xdb_searcher: xdb_searcher.h xdb_searcher.c main.c
-	gcc -g -O2 -I./ xdb_searcher.c main.c -o xdb_searcher
+	gcc -O2 -I./ xdb_searcher.c main.c -o xdb_searcher
 
 util_test: xdb_searcher.h xdb_searcher.c util_test.c
-	gcc -g -O2 -I./ xdb_searcher.c util_test.c -o util_test
+	gcc -O2 -I./ xdb_searcher.c util_test.c -o util_test
 
 xdb_searcher.o: xdb_searcher.c
 	gcc -c -o xdb_searcher.o xdb_searcher.c
@@ -21,4 +21,4 @@ clean:
 	find ./ -name xdb_searcher | xargs rm -f
 	rm -rf build
 
-.PHONY: all clean xdb_searcher util_test
\ No newline at end of file
+.PHONY: all clean xdb_searcher util_test
diff --git a/binding/c/xdb_searcher.c b/binding/c/xdb_searcher.c
index 8b9f996..53f9af6 100644
--- a/binding/c/xdb_searcher.c
+++ b/binding/c/xdb_searcher.c
@@ -6,9 +6,36 @@
 // @Author Lion <chenxin619315@gmail.com>
 // @Date   2022/06/27
 
-#include "sys/time.h"
 #include "xdb_searcher.h"
 
+// for Linux
+#ifdef XDB_LINUX
+#include "sys/time.h"
+#endif
+
+// @Note: since 2023/10/13 to compatible with the windows system
+#ifdef XDB_WINDOWS
+#include <windows.h>
+XDB_PRIVATE(int) gettimeofday(struct timeval* tp, void* tzp) {
+    time_t clock;
+    struct tm tm;
+    SYSTEMTIME wtm;
+    GetLocalTime(&wtm);
+    tm.tm_year = wtm.wYear - 1900;
+    tm.tm_mon = wtm.wMonth - 1;
+    tm.tm_mday = wtm.wDay;
+    tm.tm_hour = wtm.wHour;
+    tm.tm_min = wtm.wMinute;
+    tm.tm_sec = wtm.wSecond;
+    tm.tm_isdst = -1;
+    clock = mktime(&tm);
+    tp->tv_sec = clock;
+    tp->tv_usec = wtm.wMilliseconds * 1000;
+    return (0);
+}
+#endif
+
+
 // internal function prototype define
 XDB_PRIVATE(int) read(xdb_searcher_t *, long offset, char *, size_t length);
 
diff --git a/binding/java/src/main/java/org/lionsoul/ip2region/SearchTest.java b/binding/java/src/main/java/org/lionsoul/ip2region/SearchTest.java
index 5c70266..6ff9d07 100644
--- a/binding/java/src/main/java/org/lionsoul/ip2region/SearchTest.java
+++ b/binding/java/src/main/java/org/lionsoul/ip2region/SearchTest.java
@@ -9,6 +9,8 @@ package org.lionsoul.ip2region;
 import org.lionsoul.ip2region.xdb.Searcher;
 
 import java.io.*;
+import java.nio.charset.Charset;
+import java.nio.charset.StandardCharsets;
 import java.util.concurrent.TimeUnit;
 
 public class SearchTest {
@@ -145,7 +147,9 @@ public class SearchTest {
         Searcher searcher = createSearcher(dbPath, cachePolicy);
         long count = 0, costs = 0, tStart = System.nanoTime();
         String line;
-        final BufferedReader reader = new BufferedReader(new FileReader(srcPath));
+        final Charset charset = Charset.forName("utf-8");
+        final FileInputStream fis = new FileInputStream(srcPath);
+        final BufferedReader reader = new BufferedReader(new InputStreamReader(fis, charset));
         while ((line = reader.readLine()) != null) {
             String l = line.trim();
             String[] ps = l.split("\\|", 3);
diff --git a/data/ip2region.xdb b/data/ip2region.xdb
index c78b792..7052c05 100644
Binary files a/data/ip2region.xdb and b/data/ip2region.xdb differ
diff --git a/maker/golang/xdb/maker.go b/maker/golang/xdb/maker.go
index b2d1cfa..36ddaea 100644
--- a/maker/golang/xdb/maker.go
+++ b/maker/golang/xdb/maker.go
@@ -37,13 +37,13 @@
 //
 // data entry structure:
 // +--------------------+-----------------------+
-// | 2bytes (for desc)	| dynamic length		|
+// | 2bytes (for desc)	| dynamic length        |
 // +--------------------+-----------------------+
 //  data length   whatever in bytes
 //
 // index entry structure
 // +------------+-----------+---------------+------------+
-// | 4bytes		| 4bytes	| 2bytes		| 4 bytes    |
+// | 4bytes     | 4bytes    | 2bytes        | 4 bytes    |
 // +------------+-----------+---------------+------------+
 //  start ip 	  end ip	  data length     data ptr
 
diff --git a/maker/java/src/main/java/org/lionsoul/ip2region/xdb/Maker.java b/maker/java/src/main/java/org/lionsoul/ip2region/xdb/Maker.java
index f511853..496109c 100644
--- a/maker/java/src/main/java/org/lionsoul/ip2region/xdb/Maker.java
+++ b/maker/java/src/main/java/org/lionsoul/ip2region/xdb/Maker.java
@@ -39,13 +39,13 @@
 //
 // data entry structure:
 // +--------------------+-----------------------+
-// | 2bytes (for desc)	| dynamic length		|
+// | 2bytes (for desc)	| dynamic length        |
 // +--------------------+-----------------------+
 //  data length   whatever in bytes
 //
 // index entry structure
 // +------------+-----------+---------------+------------+
-// | 4bytes		| 4bytes	| 2bytes		| 4 bytes    |
+// | 4bytes     | 4bytes    | 2bytes        | 4 bytes    |
 // +------------+-----------+---------------+------------+
 //  start ip 	  end ip	  data length     data ptr