Preface - 前言

It was an extraordinary trip, lasted 17 days, and over 10,000 kilometers. It was a event packed trip full of great memories. With a reasonable distance to drive each day, we have been to all the places we'd planned. We already backed to our ordinary life, but the wonderful memory will last for much longer.

As one of the Grand Canyon National park ranger puts it, the US national park is our backyard, and everyone is invited to explore it.

We'd like to extend it a bit more, our planet earth is our backyard, and let's keep exploring it and always find our way back to our own backyard. Yes, our home, our sweet home.