Photo taken on July 4, 2021 shows the interior vies of the Main Press Center (MPC) at Tokyo International Exhibition Centre (Tokyo Big Sight) for the 2020 Tokyo Olympic Games that have been postponed to 2021 due to the coronavirus disease (COVID-19) pandemic in Tokyo, Japan. (Photo: Xinhua)

Photo taken on July 4, 2021 shows the working room of the MPC at Tokyo International Exhibition Centre (Tokyo Big Sight) for the 2020 Tokyo Olympic Games that have been postponed to 2021 due to the coronavirus disease (COVID-19) pandemic in Tokyo, Japan. (Photo: Xinhua)

Photo taken on July 4, 2021 shows the sign for COVID-19 countermeasures at the food court of the MPC at Tokyo International Exhibition Centre (Tokyo Big Sight) for the 2020 Tokyo Olympic Games that have been postponed to 2021 due to the coronavirus disease (COVID-19) pandemic in Tokyo, Japan. (Photo: Xinhua)

Photo taken on July 4, 2021 shows the signs for COVID-19 countermeasures at the food court of the MPC at Tokyo International Exhibition Centre (Tokyo Big Sight) for the 2020 Tokyo Olympic Games that have been postponed to 2021 due to the coronavirus disease (COVID-19) pandemic in Tokyo, Japan. (Photo: Xinhua)

Photo taken on July 3, 2021 shows the exterior view of the IBC/MPC media center at Tokyo International Exhibition Centre (Tokyo Big Sight) for the 2020 Tokyo Olympic Games that have been postponed to 2021 due to the coronavirus disease (COVID-19) pandemic in Tokyo, Japan. (Photo: Xinhua)

Photo taken on July 3, 2021 shows the exterior view of the IBC/MPC media center at Tokyo International Exhibition Centre (Tokyo Big Sight) for the 2020 Tokyo Olympic Games that have been postponed to 2021 due to the coronavirus disease (COVID-19) pandemic in Tokyo, Japan. (Photo: Xinhua)

Photo taken on July 4, 2021 shows a journalist sterilizing his hands at the entrance to the Main Press Center (MPC) for Tokyo 2020 Olympic Games at Tokyo International Exhibition Centre (Tokyo Big Sight) in Tokyo, Japan. (Photo: Xinhua)