Originally Posted by
narvik
I've had hard times during hotel check-in explaining that I don't have any recent arrival stamps, as I use eChannel. I often have to stop them from looking through the passport where they're searching for the latest stamp.
"I don't have an entry stamp as I used electronic arrival procedures: I arrived in China on xxxx" in Chinese, they nod and acknowledge that, then proceed again to look for the most recent arrival stamp.

You can print out the slip each time you enter using echannel.