A staff member shows the commemorative stamps for the opening of the 24th Olympic Winter Games at the temporary post office of the Main Media Center for the Beijing 2022 Olympic and Paralympic Winter Games in Beijing, capital of China, Feb. 5, 2022. China Post issued commemorative stamps Friday for the opening of the 24th Olympic Winter Games. (Xinhua/Li He)

Customers line up to buy commemorative stamps for the opening of the 24th Olympic Winter Games at the temporary post office of the Main Media Center for the Beijing 2022 Olympic and Paralympic Winter Games in Beijing, capital of China, Feb. 5, 2022. China Post issued commemorative stamps Friday for the opening of the 24th Olympic Winter Games. (Xinhua/Li He)

A customer shows the "first day" cover of commemorative stamps for the opening of the 24th Olympic Winter Games at the temporary post office of the Main Media Center for the Beijing 2022 Olympic and Paralympic Winter Games in Beijing, capital of China, Feb. 5, 2022. China Post issued commemorative stamps Friday for the opening of the 24th Olympic Winter Games. (Xinhua/Li He)

A customer buys the "first day" cover of commemorative stamps for the opening of the 24th Olympic Winter Games at the temporary post office of the Main Media Center for the Beijing 2022 Olympic and Paralympic Winter Games in Beijing, capital of China, Feb. 5, 2022. China Post issued commemorative stamps Friday for the opening of the 24th Olympic Winter Games. (Xinhua/Li He)