The Xiaomi Band 4 is the world's most popular smart band between Q3 2019 and Q1 2020, according to market research firm Canalys.
The Xiaomi Band 4 was also "best seller"on Amazon Japan's sports tracking category.
Xiaomi's smart bands have been a huge success from the beginning. The company sold one million initial generation Xiaomi Band in just nine months.
The Xiaomi Band 2, released in 2016, achieved the same numbers in just two months, with the Xiaomi Band 3 sold 1 million units in just 17 days.
The Xiaomi Band 4, on the other hand, reached 1 million units sold in 8 days.
Xiaomi will release the Xiaomi Band 5 to the global market on July 15 as the successor to the Band 4.