West Street of Dongdun Village, Machanghu Town, Linyi High-tech Industrial Development Zone, Shandong Province. According to the public information of Baidu map, there is a reserved hole mold in the west street of Dongdun Village, Machanghu Town, Linyi High-tech Industrial Development Zone, Shandong Province. The reserved hole mold is a mold used to reserve space for equipment, pipelines or structures in the process of building or construction.