As Shenzhen prepares to become the third Chinese city to host the Apec meeting, its province has set up media visits to tech firms.

As Shenzhen prepares to become the third Chinese city to host the Apec meeting, its province has set up media visits to tech firms.

At the display area for BYD - one of China's new-energy vehicle pioneers - the nail penetration test on a blade battery drew particular interest. Delegates leaned in, eyes fixed…