Photo taken on April 13, 2022 shows begonia flowers in the Palace Museum, also known as the Forbidden City, in Beijing, capital of China. (Xinhua/Yin Dongxun)

Photo taken on April 13, 2022 shows begonia flowers in the Palace Museum, also known as the Forbidden City, in Beijing, capital of China. (Xinhua/Yin Dongxun)

Photo taken on April 13, 2022 shows begonia flowers in the Palace Museum, also known as the Forbidden City, in Beijing, capital of China. (Xinhua/Yin Dongxun)

Photo taken on April 13, 2022 shows begonia flowers in the Palace Museum, also known as the Forbidden City, in Beijing, capital of China. (Xinhua/Yin Dongxun)

Photo taken on April 13, 2022 shows begonia flowers in the Palace Museum, also known as the Forbidden City, in Beijing, capital of China. (Xinhua/Yin Dongxun)

Photo taken on April 13, 2022 shows begonia flowers in the Palace Museum, also known as the Forbidden City, in Beijing, capital of China. (Xinhua/Yin Dongxun)

Photo taken on April 13, 2022 shows begonia flowers in the Palace Museum, also known as the Forbidden City, in Beijing, capital of China. (Xinhua/Yin Dongxun)

Photo taken on April 13, 2022 shows begonia flowers in the Palace Museum, also known as the Forbidden City, in Beijing, capital of China. (Xinhua/Yin Dongxun)