People walk on the Jiuqu Bridge in mist at Yuyuan Garden in east China's Shanghai, June 28, 2019. The garden opened its spraying system to cool down the tourists in hot summer. (Photos: Xinhua)

People walk on the Jiuqu Bridge in mist at Yuyuan Garden in east China's Shanghai, June 28, 2019. The garden opened its spraying system to cool down the tourists in hot summer.

People walk on the Jiuqu Bridge in mist at Yuyuan Garden in east China's Shanghai, June 28, 2019. The garden opened its spraying system to cool down the tourists in hot summer.

People walk on the Jiuqu Bridge in mist at Yuyuan Garden in east China's Shanghai, June 28, 2019. The garden opened its spraying system to cool down the tourists in hot summer.