People view autumn scenery at the Leopold Park in Brussels, Belgium, Oct. 26, 2020. (Xinhua/Zhang Cheng)

Photo taken on Oct. 23, 2020 shows fallen leaves at a park in Brussels, Belgium. (Xinhua/Zhang Cheng)

People walk at the Leopold Park in Brussels, Belgium, Oct. 26, 2020. (Xinhua/Zhang Cheng)

Photo taken on Oct. 26, 2020 shows the autumn scenery at the Leopold Park in Brussels, Belgium. (Xinhua/Zhang Cheng)

Photo taken on Oct. 24, 2020 shows fallen leaves at a park in Brussels, Belgium. (Xinhua/Zhang Cheng)

A tourist walks at the Leopold Park in Brussels, Belgium, Oct. 26, 2020. (Xinhua/Zhang Cheng)

Photo taken on Oct. 24, 2020 shows red maple leaves at a park in Brussels, Belgium. (Xinhua/Zhang Cheng)