It's an impressive range number, but don't try to compare it directly to range numbers for other EVs.
The current gen SU7 is available with an 830km CLTC range. If you drive one on real roads, you will not get 830km of range. :)
(xiaomi cars are not bad but they are also famous for marketing skills)
(e.g. 100 kWh, 400 miles -> 10 kWh / 100 miles or 4 miles / kWh)