Translation of your link, Google translate.
Amazing virus, still a master of mathematics
January 30: 170 deaths / confirmed 7821 = 2.1%,
January 31: 213 deaths / confirmed 9800 = 2.1%,
February 1: 259 deaths / diagnosed 11880 = 2.1%,
February 2: 304 deaths / confirmed 14401 = 2.1%,
February 3: 361 deaths / confirmed 17238 = 2.1%,
February 4: 429 deaths / confirmed 20471 = 2.1%,
February 5: 493 deaths / confirmed 24441 = 2.1%
February 6: 564 deaths / confirmed 28605 = 2.1%
WHO knew viruses were good at math?
Pick a number, any number, but the death rate must equal 2.1%