Xiaomi EV Road Test Data: Will 2,684 Test Cars and 35.51 Million Km Pass Peer Review?

When a new EV maker releases road test data, should we focus on the absolute numbers or the validity of the experimental design? Hu Zhengnan announced that Xiaomi Auto invested a total of 2,684 test vehicles across 4 products for cumulative road testing exceeding 35.51 million kilometers. This figure quickly translated into an image of "steady accumulation leading to a breakthrough" in public opinion. But from an academic perspective, sample size, mileage distribution, and how well they match the test conditions are key to determining the reliability of the conclusions—after all, in the NLP field, a model trained on 100k labeled samples might be less effective than one trained on 10k carefully designed negative-sampled examples.