Photo taken in Tokyo, Japan, on June 7, 2019, shows the model of the National Speed Skating Oval in the promotion exhibition area of Beijing 2022 at "Beijing Week", a series of activities to commemorate the 40th anniversary of the establishment of sister-city relations between Beijing and Tokyo. (Xinhua/Du Xiaoyi)

Artists present a Chinese traditional music performance during the Beijing 2022 promotion event at "Beijing Week", a series of activities to commemorate the 40th anniversary of the establishment of sister-city relations between Beijing and Tokyo, in Tokyo, Japan, on June 8, 2019. (Xinhua/Zhang Jing)

Photo taken in Tokyo, Japan, on June 7, 2019, shows the promotion exhibition area of Beijing 2022 at "Beijing Week", a series of activities to commemorate the 40th anniversary of the establishment of sister-city relations between Beijing and Tokyo. (Xinhua/Du Xiaoyi)

Photo taken in Tokyo, Japan, on June 7, 2019, shows the promotion exhibition area of Beijing 2022 at "Beijing Week", a series of activities to commemorate the 40th anniversary of the establishment of sister-city relations between Beijing and Tokyo. (Xinhua/Du Xiaoyi)