Apart from avoiding the steep mountain in the beginning of the Baiyangyu section, another advantages of taking the easy way up is to see the two stone tablets inserted into the south side of the wall to mark the joint of to different sections.

West of the boundary tablet white limestones are used as the base of the wall, while east of the boundary tablet, purple stones are used as the base. The red and white stones at the jointing point make a striking contrast.

The western tablet bearing the inscription zhong xie tai ping lu dong jie marks the eastern boundary of the Zhongxietaiping road.

The eastern tablet bearing the inscription dong xie yan he lu xi jie marks the western boundary of the Dongxieyanhe road.

During the Ming Dynasty the Great Wall in the Tangshan area was under the administration of Ji Town, which was on of nine towns. Ji Town consisted of twelve regions, each being responsible for the defence and renovation of the Great Wall in its area. During the construction of the wall, stone tablets were installed at the border between the regions. The two tablets shown here thus mark the boundary between the Yanhe and Taiping region.