diff --git a/internal/commands/keys.go b/internal/commands/keys.go
index 61f000d..ea22edd 100644
--- a/internal/commands/keys.go
+++ b/internal/commands/keys.go
@@ -106,7 +106,7 @@ func CalcSlots(keys []string) []int {
 		if len(hashtag) > 0 {
 			key = hashtag
 		}
-		slots[inx] = int(utils.Crc16(key) & 0x3fff)
+		slots[inx] = int(utils.KeyHash(key) & 0x3fff)
 	}
 	return slots
 }
diff --git a/internal/utils/crc16.go b/internal/utils/crc16.go
index 8aa400b..243e6fb 100644
--- a/internal/utils/crc16.go
+++ b/internal/utils/crc16.go
@@ -81,8 +81,13 @@ var crc16tab = [256]uint16{
 
 func Crc16(buf string) uint16 {
 	var crc uint16
-	for _, n := range buf {
+	bytesBuf := []byte(buf)
+	for _, n := range bytesBuf {
 		crc = (crc << uint16(8)) ^ crc16tab[((crc>>uint16(8))^uint16(n))&0x00FF]
 	}
 	return crc
 }
+
+func KeyHash(buf string) uint16 {
+	return Crc16(buf) & 0x3FFF
+}
diff --git a/internal/utils/crc_test.go b/internal/utils/crc_test.go
new file mode 100644
index 0000000..bc368ae
--- /dev/null
+++ b/internal/utils/crc_test.go
@@ -0,0 +1,10 @@
+package utils
+
+import "testing"
+
+func TestCrc16(t *testing.T) {
+	ret := KeyHash("你")
+	if ret != 8522 {
+		t.Errorf("KeyHash failed, expect: %d, actual: %d", 8522, ret)
+	}
+}