Rizhao High-speed Railway or the Southern Shandong Rapid Transit Passage, is a high-speed railway extending from Rizhao City in Shandong Province to Lankao County in Henan Province. It mainly passes through the southern part of Shandong Province and serves as a regional connection line within the "Eight Vertical and Eight Horizontal" high-speed railway network outlined in the "Medium and Long-Term Railway Network Plan" (2016 edition). Additionally, it is an important part of Shandong Province's "Three Horizontals and Five Vertices" high-speed railway network.