Tourists visit the Pipa Spring in Jinan, capital of East China's Shandong province, Sept 6, 2018, the 15th anniversary of the reactivation of the springs in Jinan, with the Baotu Spring as the main representative. [Photo/Xinhua]

Tourists visit the Wuyou Spring in Jinan, capital of East China's Shandong province, Sept 6, 2018, the 15th anniversary of the reactivation of the springs in Jinan, with the Baotu Spring as the main representative. [Photo/Xinhua]