Black Tiger Spring (Heihuquan) lies in the southeastern part of the old city district of Ji'nan. On the southern wall of the pool are three carved stone tiger heads and from the tiger mouths spring water comes out. Hence, it gets the name of the spring. However, someone believes that spring water dashing against rocks produces a noise like the roars of a tiger: hence the name.
Black Tiger Spring is one of the four most famous springs of Ji'nan, ranking first in rate of flow among all the springs inside and outside the city. As with most of Ji'nan's springs, the best time to visit this sight is at peak rainfall, generally around July and August.