diff --git a/src/main/java/com/mini/capi/utils/vF.java b/src/main/java/com/mini/capi/utils/vF.java
index f4a0bd1..cc59bee 100644
--- a/src/main/java/com/mini/capi/utils/vF.java
+++ b/src/main/java/com/mini/capi/utils/vF.java
@@ -6,22 +6,24 @@ import java.math.RoundingMode;
 public class vF {
 
 
-    private static final String[] UNITS = {"B", "K", "M", "G", "T", "P"};
-    private static final BigDecimal KB = BigDecimal.valueOf(1024L);
+    // 注意：起点是 KB，所以后面依次是 M、G、T、P
+    private static final String[] UNITS = {"K", "M", "G", "T", "P"};
+    private static final BigDecimal UNIT = BigDecimal.valueOf(1024L);
 
-    public static String format(long bytes) {
-        if (bytes < 0) {
-            throw new IllegalArgumentException("字节数不能为负数");
+    public static String format(long kBytes) {
+        if (kBytes < 0) {
+            throw new IllegalArgumentException("KB 数不能为负数");
         }
 
-        BigDecimal size = BigDecimal.valueOf(bytes);
+        BigDecimal size = BigDecimal.valueOf(kBytes);
         int unitIndex = 0;
 
-        while (size.compareTo(KB) >= 0 && unitIndex < UNITS.length - 1) {
-            size = size.divide(KB, 2, RoundingMode.HALF_UP);
+        while (size.compareTo(UNIT) >= 0 && unitIndex < UNITS.length - 1) {
+            size = size.divide(UNIT, 2, RoundingMode.HALF_UP);
             unitIndex++;
         }
 
+        // 去掉无意义的 0 和小数点
         String num = size.stripTrailingZeros().toPlainString();
         return num + UNITS[unitIndex];
     }