diff --git a/Makefile b/Makefile
index d9c6229..ffd0375 100644
--- a/Makefile
+++ b/Makefile
@@ -1,6 +1,7 @@
 CFLAGS =
 
 TARGET = chsrc
+TEST_TARGET = test_$(TARGET)
 #=======================
 
 all:
@@ -8,8 +9,8 @@ all:
 	@gcc chsrc.c $(CFLAGS) -o $(TARGET)
 
 test:
-	@gcc test_helper.c -o test
-	@./test
+	@gcc test_helper.c -o $(TEST_TARGET)
+	@./$(TEST_TARGET)
 
 test_cmd: $(TARGET)
 	./$(TARGET) list mirror
diff --git a/helper.h b/helper.h
index bb7088d..b9a7b27 100644
--- a/helper.h
+++ b/helper.h
@@ -176,7 +176,7 @@ xy_2strjoin (const char* str1, const char* str2)
 static char*
 xy_strjoin (unsigned int count, ...)
 {
-  size_t al_fixed = 256;
+  size_t al_fixed = 128;
   char* ret = calloc(1, al_fixed);
   // 已分配次数
   int al_times = 1;
@@ -194,14 +194,26 @@ xy_strjoin (unsigned int count, ...)
 
   for(int i=0; i<count; i++)
   {
+    // 是否需要重新分配
+    bool need_realloc = false;
+
     str = va_arg(args, const char*);
     al_need += strlen(str);
-    if (al_need > al_cur) {
+    while (al_need > al_cur) {
       al_times += 1; al_cur = al_times * al_fixed;
+      need_realloc = true;
+    }
+    // printf("al_times %d, al_need %zd, al_cur %zd\n", al_times, al_need, al_cur);
+    if (need_realloc) {
+      ptrdiff_t diff = cur - ret;
       ret = realloc(ret, al_cur);
-      if (NULL==ret) { xy_error ("xy: No availble memory!"); return NULL; }
+      cur = ret + diff;
+    }
+    if (NULL==ret) {
+      xy_error ("xy: No availble memory!"); return NULL;
     }
     strcpy(cur, str);
+    // puts(ret);
     cur += strlen(str);
   }
   va_end(args);
diff --git a/test_helper.c b/test_helper.c
index e0dfc33..ad41bb0 100644
--- a/test_helper.c
+++ b/test_helper.c
@@ -2,7 +2,7 @@
 * File          : test_helper.c
 * Authors       : Aoran Zeng <ccmywish@qq.com>
 * Created on    : <2023-08-30>
-* Last modified : <2023-08-30>
+* Last modified : <2023-09-02>
 *
 * test_helper:
 *
@@ -18,8 +18,9 @@ main (int argc, char const *argv[])
   xy_useutf8();
   puts(xy_2strjoin("Xi",    "'an"));
   puts(xy_strjoin (2, "Xi", "'an"));
-  puts(xy_strjoin(3, "中文输出",  " XiangYang", " shan shui"));
-  puts(xy_strjoin(4, "中文输出2", " XianYan",   " hao", " feng jing"));
+  puts(xy_strjoin(3, "屈身守分，",   "以待天时，",  "不可与命争也"));
+  puts(xy_strjoin(4, "水落鱼梁浅，", "天寒梦泽深。", "羊公碑字在，", "读罢泪沾襟。"));
+  puts(xy_strjoin(6, "楚山横地出，", "汉水接天回。", "冠盖非新里，", "章华即旧台。", "习池风景异，", "归路满尘埃。"));
 
   xy_success("成功：输出成功内容");
   xy_info("信息: 输出信息内容");