What is the big circle in front of the Central Plains Giant Buddha?

A large-scale stone carving art installation named "Tianyuan Square". The Central Plains Giant Buddha is located in Songxian County, Luoyang City, Henan Province. The circle in front of the Giant Buddha is a large-scale stone carving art installation named "Tianyuan Chu", which is a part of the Central Plains Giant Buddha Scenic Area. The device is 50 meters in diameter and made of gray marble, which has a strong Buddhist cultural atmosphere.