Artists perform during the closing ceremony of the 2019 Beijing International Horticultural Exhibition in Beijing, capital of China, Oct. 9, 2019. (Xinhua/Zhai Jianlan)

Artists perform during the closing ceremony of the 2019 Beijing International Horticultural Exhibition in Beijing, capital of China, Oct. 9, 2019. (Xinhua/Zhai Jianlan)

Artists perform during the closing ceremony of the 2019 Beijing International Horticultural Exhibition in Beijing, capital of China, Oct. 9, 2019. (Xinhua/Zhai Jianlan)

Artists perform during the closing ceremony of the 2019 Beijing International Horticultural Exhibition in Beijing, capital of China, Oct. 9, 2019. (Xinhua/Zhai Jianlan)

Artists perform during the closing ceremony of the 2019 Beijing International Horticultural Exhibition in Beijing, capital of China, Oct. 9, 2019. (Xinhua/Zhai Jianlan)

Artists perform during the closing ceremony of the 2019 Beijing International Horticultural Exhibition in Beijing, capital of China, Oct. 9, 2019. (Xinhua/Zhai Jianlan)

Artists perform during the closing ceremony of the 2019 Beijing International Horticultural Exhibition in Beijing, capital of China, Oct. 9, 2019. (Xinhua/Zhai Jianlan)

Artists perform during the closing ceremony of the 2019 Beijing International Horticultural Exhibition in Beijing, capital of China, Oct. 9, 2019. (Xinhua/Zhai Jianlan)

Artists perform during the closing ceremony of the 2019 Beijing International Horticultural Exhibition in Beijing, capital of China, Oct. 9, 2019. (Xinhua/Zhai Jianlan)