Visitors tour the UK Elizabeth's garden of the International Horticultural Exhibition 2024 Chengdu in Chengdu, southwest China's Sichuan Province, May 1, 2024. Visitors across China visited the main venue of the International Horticultural Exhibition 2024 Chengdu during the May Day holiday. (Xinhua/Jiang Hongjing)

Visitors tour the Changsha garden of the International Horticultural Exhibition 2024 Chengdu in Chengdu, southwest China's Sichuan Province, May 1, 2024. Visitors across China visited the main venue of the International Horticultural Exhibition 2024 Chengdu during the May Day holiday. (Xinhua/Jiang Hongjing)

Visitors tour the Shanghai garden of the International Horticultural Exhibition 2024 Chengdu in Chengdu, southwest China's Sichuan Province, May 1, 2024. Visitors across China visited the main venue of the International Horticultural Exhibition 2024 Chengdu during the May Day holiday. (Xinhua/Jiang Hongjing)

Visitors tour the Chengdu garden of the International Horticultural Exhibition 2024 Chengdu in Chengdu, southwest China's Sichuan Province, May 1, 2024. Visitors across China visited the main venue of the International Horticultural Exhibition 2024 Chengdu during the May Day holiday. (Xinhua/Jiang Hongjing)

A pupil provides free guide service to visitors at the Chengdu garden of the International Horticultural Exhibition 2024 Chengdu in Chengdu, southwest China's Sichuan Province, May 1, 2024. Visitors across China visited the main venue of the International Horticultural Exhibition 2024 Chengdu during the May Day holiday. (Xinhua/Jiang Hongjing)

Visitors view rare plants at the Hong Kong garden of the International Horticultural Exhibition 2024 Chengdu in Chengdu, southwest China's Sichuan Province, May 1, 2024. Visitors across China visited the main venue of the International Horticultural Exhibition 2024 Chengdu during the May Day holiday. (Xinhua/Jiang Hongjing)