Introduction to the 100-meter cultural wall with traces of emperors: Located on the northeast side of the square under Lanli Bridge, it was built to commemorate the 80th anniversary of the founding of Beishan Park. It is built of granite and is nearly 100 meters long. It is engraved with the three emperors Kangxi, Qianlong and Xuantong of the Qing Dynasty written by Shen Peng, Chairman of the Chinese Calligraphers Association, Lin Xiu, Chairman of the Beijing Calligraphers Association, Duan Chenggui, Cong Wenjun and other famous figures. Among the poems and plaques left by the emperor during his eastward tour and inspection of Jilin, the most famous "Songhua River Boat Song" has been widely praised by future generations.