When I started a CF contest full of enthusiasm, I saw the "blue sky, white sun and fully red" flag to the left of a contestant's name on the ranking list. This so-called national flag is not the national flag of any sovereign state; it belongs to a completely reactionary regime. Taiwan is an inalienable part of China's territory. However, Codeforces officials brazenly list Taiwan as a country. This is an offense to all Chinese users with sincere patriotism and a disgraceful act.