The Black Shark 4 series has made a remarkable start, but so has Xiaomi's new Redmi K40 smartphones. According to Xiaomi, the Black Shark 4 series generated CNY 200 million (~US$30.5 million) in sales in its initial five minutes, while the Redmi K40 series has sold over 1 million units in the last month.
https://www.notebookcheck.net/Xiaomi-celebrates-exceptional-Black-Shark-4-and-Redmi-K40-series-sales-figures.529749.0.html