Artists perform China's Kunqu opera "The Peony Pavilion" at the Liuyuan garden for tourists during the Qingming Festival holidays in Suzhou, east China's Jiangsu Province, April 5, 2019. (Photos: Xinhua)

Tourists view an artist's performance in the Liuyuan garden during the Qingming Festival holidays in Suzhou, east China's Jiangsu Province, April 5, 2019.

Tourists view the scenery of the Slender West Lake during the Qingming Festival holidays in Yangzhou, east China's Jiangsu Province, April 5, 2019.

Aerial photo taken on April 5, 2019 shows tourists taking boats to view the scenery of the ancient town of Taierzhuang during the Qingming Festival holidays in Zaozhuang, east China's Shandong Province.

Tourists take boats to view the scenery of Tongli ancient town during the Qingming Festival holidays in Suzhou, east China's Jiangsu Province, April 5, 2019.

Tourists take boats to view the scenery of the ancient town of Taierzhuang during the Qingming Festival holidays in Zaozhuang, east China's Shandong Province, April 5, 2019.

Tourists view the scenery of the Slender West Lake during the Qingming Festival holidays in Yangzhou, east China's Jiangsu Province, April 5, 2019.

Tourists enjoy the view of blooming tulips at the Meiyuan garden during the Qingming Festival holidays in Wuxi, east China's Jiangsu Province, April 5, 2019.

Tourists view the Zhaozhou Bridge, the oldest standing stone-arched bridge in China, across the Xiaohe River in Zhaoxian County, north China's Hebei Province, April 5, 2019.

Tourists enjoy themselves at the Zhouji Green Expo Garden during the Qingming Festival holidays in Nantong, east China's Jiangsu Province, April 5, 2019.

Tourists ride bikes to view flowers during the Qingming Festival holidays at Xiema Village of Bozhou, east China's Anhui Province, April 5, 2019.