Aircrafts of Belgian Air Component are seen during the National Day parade in Brussels, Belgium, July 21, 2021. A ceremony to mark Belgium's National Day held at the Place des Palais here Wednesday paid tribute to all the people who played a role in the battle against the coronavirus pandemic. (Xinhua/Zhang Cheng)
People hold a Belgian national flag to celebrate the National Day in Brussels, Belgium, July 21, 2021. A ceremony to mark Belgium's National Day held at the Place des Palais here Wednesday paid tribute to all the people who played a role in the battle against the coronavirus pandemic. (Xinhua/Zhang Cheng)
Belgium's Crown Princess Elisabeth (C) marches with cadets of the military school during the National Day parade in Brussels, Belgium, July 21, 2021. A ceremony to mark Belgium's National Day held at the Place des Palais here Wednesday paid tribute to all the people who played a role in the battle against the coronavirus pandemic. (Laurie Dieffembacq/Handout via Xinhua)
People hold a Belgian national flag to celebrate the National Day in Brussels, Belgium, July 21, 2021. A ceremony to mark Belgium's National Day held at the Place des Palais here Wednesday paid tribute to all the people who played a role in the battle against the coronavirus pandemic. (Xinhua/Zhang Cheng)
People watch the National Day parade in Brussels, Belgium, July 21, 2021. A ceremony to mark Belgium's National Day held at the Place des Palais here Wednesday paid tribute to all the people who played a role in the battle against the coronavirus pandemic. (Xinhua/Zhang Cheng)