(Source: CGTN)

As a Chinese astronaut from the Tiangong 2 Space lab, and an EU astronaut from the International Space Station had a cordial little video-chat. And as it turns out, it wasn't just a standard work call, though it started with business.

And then, this.

Transmission takes a couple of weeks. But it's so worth the wait.

It's not just the training program CAVES where international astronauts, including Chinese astronaut Ye Guangfu, worked together in a completely dark, detached, space-like environment. China and the EU have worked closely since a co-operational framework agreement was reached in 2014.

That, and similar life-style choices, are probably why Pesquet learnt Chinese for this.