I was a space kid, always traveling in my imagination, and old habits die hard.

In recent years Tiancheng has spent much of his time rambling about the mountainous shore of the Lijiang River.

At that moment the garden gate swung to; the ramblers were returning.

Hot balloon: It is invented by Frenchmen 200 years ago. It is a flight of earlier human being. It is still used to travel in the sky.

No, seriously. I've always dreamed of traveling in space, floating in zero gravity, gazing down on the Earth.