The 500 mile range is a pretty standout feature. That beats basically anything currently on the market aside from the eyewateringly-expensive Lucid Air.
Maybe you've already taken this into account, but CLTC ratings tend to be 20-40% higher than the way range is calculated in the US. eg a Tesla MY LR has 330 miles of range in US vs 430 miles in China, but it's basically the same car
That seems like an unreasonably high level of confidence to have when paired with no supporting material.
A Model 3 has a battery no larger than 83kWh. A BMW i4 has a battery no larger than 84kWh. This car has a 101kWh battery. Considering the cars appear roughly approximately equally aerodynamic, it seems reasonable to expect the car with the 20% larger battery to be able to go about 20% further.
It is not only about battery size, but also about efficiency. Model 3 and i4 have very efficient motors, specially the BMW (non-permanent magnet type). I have difficulties believing than Xiaomi can reach such efficiency levels in 36 months development. It is also important to note that those 20% extra kWh are heavy, and need to be accelerated to cruise speeds several times during normal-driving. I stand my point and don't think that the xiaomi will even reach 700km in best conditions (The BMW i4 made around 650km)
