Chinese: 兰州空战纪念碑,潮阳山 Lánzhōu Kōngzhàn Jìniànbēi, Cháoyáng Shān 
Map: Here

Cháoyáng Shān (潮阳山) is the hill to the east of Baita Shan. At the top, overlooking the Yellow River, is a monument to the Soviet pilots who died during the air battles of Lanzhou during the Second Sino-Japanese War (1937-1941). Take the back road to Baita Shan but go straight on at the gate, and follow the road up to the top.
 
 

There is a route up Baita Shan that takes you along the perimeter of the park itself, and brings you out on the road behind. Look for the steps that lead up to the mosque, to the right of the park entrance. As you climb, Chaoyang Shan is the hillside to the east. Map here.