Update README

README.md

@@ -44,4 +44,25 @@
  --expiry-year 2022 \
  --card-holder-name "The tester" \
  --email "monty@python.com"
+```
+
+### Order a product
+
+```
+(ucloud-cli) [test@ungleich ucloud-cli]$ UCLOUD_PAY_SERVER=http://127.0.0.1:5000 python ucloud.py product order \
+--name xxxxxxxxxxxxxxxxx \
+--realm xxxxxxxxxxxxxxxx \
+--seed xxxxxxxxxxxxxxxx \
+--email "monty@python.com" \
+--product-id aabc34208e514803a0ee62d697b37e8c
+```
+
+### Listing different orders
+
+```
+(ucloud-cli) [test@ungleich ucloud-cli]$  UCLOUD_PAY_SERVER=127.0.0.1:5000 python ucloud.py order list \  
+--name xxxxxxxxxxxxxxx \
+--realm xxxxxxxxxxxxxxx \ 
+--seed xxxxxxxxxxxxxxxxx \
+--email "monty@python.com"
 ```