More interesting is that they're claiming 248 miles (400km) on a 45kWh battery[0]. That calculates out to 5.5 miles/kWh, whereas the most efficient Tesla 3 right now only claims 4.5 miles/kWh - and even that is a very optimistic estimate (most people can't get 270 miles out of their 60kWh Tesla 3 standard range models) [1]
[0] https://cdn.motor1.com/images/custom/worlds-first-mass-produ...
[1] https://insideevs.com/news/719013/2024-tesla-model3-epa-rang...