The Mesoproterozoic and Neoproterozoic National Nature Reserve

　　The Mesoproterozoic and Neoproterozoic National Nature Reserve is located north of Jixian County in Tianjin, east of the road from Jixian County to Huangyaguan. It is China’s first national geological nature reserve. The stratigraphic standard section of the Mesoproterozoic and Neoproterozoic formations was formed between 1.8 billion and 800 million years ago. It begins at Changzhou Village in the northeastern corner of the county, extending layer upon layer in a northeast-to-southwest direction until reaching F Junshan near the county seat. It stretches approximately 24 kilometers from north to south and averages about 350 meters in width from east to west. The strata here are complete, continuously exposed, well-preserved, and rich in paleontological fossils. The reserve also includes an exhibition hall.

　　The reserve features overlapping mountains and beautiful scenery. To the north lies the winding Huangyaguan Great Wall

　　, to the south is the ancient cultural hub of Yuyang Ancient Prefecture, to the west is Panshan Mountain — known as the “First Mountain East of the Capital,” and to the east are the Qing Dongling (Eastern Qing Tombs) and the neighboring Baxianzhuozi Nature Reserve, making it an excellent destination for sightseeing.