We hear from inside China on the remarkably fast electric vehicle transition going on there, as the country moves away from petrol and diesel-powered cars and lorries. BBC Transport Correspondent Nick Marsh reports on the latest EV technology that's making Chinese brands popular and affordable.

Also on Tech Life this week, who has the fastest computer in the world ? And what is it used for ? An expert tells us everything we need to know about supercomputers. And we find out about a new piece of tech that can provide electricity, transport and clean drinking water in disaster zones - using solar power.

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Presenter: Zoe Kleinman

Image: A photo of an electric car charging in China. Credit: Master/Getty Images.