Tanks are seen during a parade to mark the 75th anniversary of the liberation of Brussels in Mons, Belgium, on Sept. 1, 2019. The allied forces liberated Brussels from German occupation in 1944 during World War II. (Photo: Xinhua)

Tanks are seen during a parade to mark the 75th anniversary of the liberation of Brussels in Mons, Belgium, on Sept. 1, 2019. The allied forces liberated Brussels from German occupation in 1944 during World War II.(Photo: Xinhua)

Military vehicles are seen during a parade to mark the 75th anniversary of the liberation of Brussels in Mons, Belgium, on Sept. 1, 2019. The allied forces liberated Brussels from German occupation in 1944 during World War II. (Photo: Xinhua)

Military vehicles are seen during a parade to mark the 75th anniversary of the liberation of Brussels in Mons, Belgium, on Sept. 1, 2019. The allied forces liberated Brussels from German occupation in 1944 during World War II. (Photo: Xinhua)

People visit an exhibition of military vehicles during an event to mark the 75th anniversary of the liberation of Brussels in Mons, Belgium, on Sept. 1, 2019. The allied forces liberated Brussels from German occupation in 1944 during World War II. (Photo: Xinhua)

Children pose for photos on a tank during an event to mark the 75th anniversary of the liberation of Brussels in Mons, Belgium, on Sept. 1, 2019. The allied forces liberated Brussels from German occupation in 1944 during World War II. (Photo: Xinhua)

A girl poses for photos on a military vehicle during a parade to mark the 75th anniversary of the liberation of Brussels in Mons, Belgium, on Sept. 1, 2019. The allied forces liberated Brussels from German occupation in 1944 during World War II. (Photo: Xinhua)

Tanks are seen during a parade to mark the 75th anniversary of the liberation of Brussels in Mons, Belgium, on Sept. 1, 2019. The allied forces liberated Brussels from German occupation in 1944 during World War II. (Photo: Xinhua)

Military vehicles are seen during a parade to mark the 75th anniversary of the liberation of Brussels in Mons, Belgium, on Sept. 1, 2019. The allied forces liberated Brussels from German occupation in 1944 during World War II. (Photo: Xinhua)

Military vehicles are seen during a parade to mark the 75th anniversary of the liberation of Brussels in Mons, Belgium, on Sept. 1, 2019. The allied forces liberated Brussels from German occupation in 1944 during World War II. (Photo: Xinhua)

People view tanks during an event to mark the 75th anniversary of the liberation of Brussels in Mons, Belgium, on Sept. 1, 2019. The allied forces liberated Brussels from German occupation in 1944 during World War II. (Photo: Xinhua)