diff --git a/pkcs15-tools.md b/pkcs15-tools.md
index c2984c0..e546b00 100644
--- a/pkcs15-tools.md
+++ b/pkcs15-tools.md
@@ -1,3 +1,12 @@
+```shell
+$ pkcs15-tool --list-info
+Using reader with a card: Yubico YubiKey OTP+FIDO+CCID
+PKCS#15 Card [hatterjiang]:
+	Version        : 0
+	Serial number  : f8611841ff8055ac3da54acba9975cee
+	Manufacturer ID: piv_II 
+	Flags          : 
+```
 
 ```shell
 $ pkcs15-tool --list-certificates