Redmi's K20 phones were always going to be best-sellers. The devices, in about a month since they went on sale, have done impressively on the market, with the company confirming sales of a million units. This is even more astonishing when one considers that the K20 Pro is currently exclusive to China, and the regular K20 has been rebranded as the Mi 9T in Europe.
https://www.notebookcheck.net/Redmi-has-already-sold-a-million-K20-phones.426788.0.html