Photo taken on April 30, 2021 shows colorful leaves by the Lake Burley Griffin in Canberra, Australia. When weather is getting warmer in the Northern Hemisphere, Australia is in the autumn. Leaves turned yellow and red, making the city of Canberra more colorful. (Photo by Chu Chen/Xinhua)

Photo taken on May 1, 2021 shows the autumn scenery by the Lake Burley Griffin in Canberra, Australia. When weather is getting warmer in the Northern Hemisphere, Australia is in the autumn. Leaves turned yellow and red, making the city of Canberra more colorful. (Photo by Chu Chen/Xinhua)

Photo taken on May 1, 2021 shows the autumn scenery of the Lake Burley Griffin in Canberra, Australia. When weather is getting warmer in the Northern Hemisphere, Australia is in the autumn. Leaves turned yellow and red, making the city of Canberra more colorful. (Photo by Chu Chen/Xinhua)

People walk by the Lake Burley Griffin in Canberra, Australia, April 30, 2021. When weather is getting warmer in the Northern Hemisphere, Australia is in the autumn. Leaves turned yellow and red, making the city of Canberra more colorful. (Photo by Chu Chen/Xinhua)

Photo taken on April 30, 2021 shows colorful leaves in the autumn in Canberra, Australia. When weather is getting warmer in the Northern Hemisphere, Australia is in the autumn. Leaves turned yellow and red, making the city of Canberra more colorful. (Photo by Chu Chen/Xinhua)

Kids play by the Lake Burley Griffin in Canberra, Australia, April 30, 2021. When weather is getting warmer in the Northern Hemisphere, Australia is in the autumn. Leaves turned yellow and red, making the city of Canberra more colorful. (Photo by Chu Chen/Xinhua)

People row a boat on the Lake Burley Girffin in Canberra, Australia, May 1, 2021. When weather is getting warmer in the Northern Hemisphere, Australia is in the autumn. Leaves turned yellow and red, making the city of Canberra more colorful. (Photo by Chu Chen/Xinhua)

Photo taken on May 1, 2021 shows the autumn scenery in Canberra, Australia. When weather is getting warmer in the Northern Hemisphere, Australia is in the autumn. Leaves turned yellow and red, making the city of Canberra more colorful. (Photo by Chu Chen/Xinhua)

Photo taken on May 1, 2021 shows the autumn scenery of the National Arboretum in Canberra, Australia. When weather is getting warmer in the Northern Hemisphere, Australia is in the autumn. Leaves turned yellow and red, making the city of Canberra more colorful. (Photo by Chu Chen/Xinhua)

Photo taken on April 30, 2021 shows the autumn scenery of the Lake Burley Griffin in Canberra, Australia. When weather is getting warmer in the Northern Hemisphere, Australia is in the autumn. Leaves turned yellow and red, making the city of Canberra more colorful. (Photo by Chu Chen/Xinhua)

People ride bikes by the Lake Burley Griffin in Canberra, Australia, May 1, 2021. When weather is getting warmer in the Northern Hemisphere, Australia is in the autumn. Leaves turned yellow and red, making the city of Canberra more colorful. (Photo by Chu Chen/Xinhua)