People walk on the light-decorated steps in Valletta, capital of Malta, on Oct. 13, 2021. Pedestrian spaces in Valletta's streets and squares are adorned with illuminations for the initiative Light Up Valletta. (Photo: Xinhua)

People walk on a light-decorated street in Valletta, capital of Malta, on Oct. 13, 2021. Pedestrian spaces in Valletta's streets and squares are adorned with illuminations for the initiative Light Up Valletta. (Photo: Xinhua)

People walk up the light-decorated steps in Valletta, capital of Malta, on Oct. 13, 2021. Pedestrian spaces in Valletta's streets and squares are adorned with illuminations for the initiative Light Up Valletta. (Photo: Xinhua)

People walk on a light-decorated street in Valletta, capital of Malta, on Oct. 13, 2021. Pedestrian spaces in Valletta's streets and squares are adorned with illuminations for the initiative Light Up Valletta. (Photo: Xinhua)

People walk on a light-decorated street in Valletta, capital of Malta, on Oct. 13, 2021. Pedestrian spaces in Valletta's streets and squares are adorned with illuminations for the initiative Light Up Valletta. (Photo: Xinhua)