It's one of northern China's most picturesque scenes. The Taihang Mountain in the city of Changzhi offers a breathtaking summer view. Aerial shots show the Tong Tian Canyon there covered in lush green. It's located at the intersection of Shanxi and Henan Provinces, covering an area of 56 square kilometers. The main canyon is as long as 26 kilometers. The scenic spot reopened on February 28th and has since been free for health care workers.