No, it's not really a bus, either...

Lots and lots of people on Twitter have said this in response to a tweet which seemed a little too excited about a Chinese thing:

But honestly, and at risk of being labelled a Tankie, I don't think it's right to call it an articulated bus.

The technology was discussed in an article at The Conversation a few years ago:

Trackless trams are neither a tram nor a bus, though they have rubber wheels and run on streets. The high-speed rail innovations have transformed a bus into something with all the best features of light rail and none of its worst features.

It replaces the noise and emissions of buses with electric traction from batteries recharged at stations in 30 seconds or at the end of the line in 10 minutes. That could just be an electric bus, but the ART is much more than that. It has all the speed (70kph), capacity and ride quality of light rail with its autonomous optical guidance system, train-like bogies with double axles and special hydraulics and tyres. 

It can slide into the station with millimetre accuracy and enable smooth disability access. It passed the ride quality test when I saw kids running up and down while it was going at 70kph – you never see this on a bus due to the sway.  

The autonomous features mean it is programmed, optically guided with GPS and LIDAR technologies, into moving very precisely along an invisible track. If an accident happens in the right of way a “driver” can override the steering and go around. It can also be driven to a normal bus depot for overnight storage and deep battery recharge.

As the article notes, Sydney might have been a lot better off with this system running down George Street (although I didn't realise how extensive the light rail in Sydney was until my last visit.)