Tiananmen Square in central Beijing has been decorated with flower gardens to welcome International Workers Day. (Photo: People's Daily)

Tourists view the "Spectra" light and water show, returning after a 2-year hiatus due to the COVID-19 countermeasures, held at Singapore's Marina Bay Sands on Thursday. (Photo: Xinhua)

A baby bursts into tears when getting a vaccine shot in the arm at a community health service center in Handan, Hebei Province on Monday, which was Children's Vaccination Day in China. (Photo: Sipa)

A child has an ice cream during a heat wave in Amritsar, Punjab state, Northern India, on Friday. A heat wave has gripped entire northern India, including Delhi, Rajasthan, Uttar Pradesh, Haryana, Himachal Pradesh and Punjab. (Photo: Xinhua)

A halo, an optical illusion that appears around the sun, is seen in the sky in Southwest China's Sichuan Province, on Thursday. (Photo: China News Service)

A Muslim boy waits to break his day-long fast during Ramadan in Hyderabad, India, on Wednesday. Islam's holiest month is a period of intense prayer, dawn-to-dusk fasting and nightly feasts. (Photo: AP)

Residents and dogs sit along a street as foam rising from the Balsillas River wafts over the Los Puentes neighborhood in Mosquera, Colombia, on Wednesday. According to local authorities, the white, toxic foam is caused in part by untreated sewage mixing with chemicals found in household detergents. (Photo: AP)

Spectacular view of a herd of buffaloes crossing the Jialing River to forage on Taiyang island, Peng'an county, Southwest China's Sichuan Province, on Friday. (Photo: China News Service)

A regional train travels through the outskirts of Frankfurt, Germany, on a misty Thursday morning. (Photo: AP)

Aerial photo taken on Tuesday shows jacaranda trees in full bloom in Kunming, Southwest China's Yunnan Province. (Photo: Xinhua)