Located in northeastern Beijing, Miyun is the city's largest district and a dedicated ecological conservation area. With over 70% forest coverage, Miyun boasts a pristine environment, consistently ranking first in Beijing for both air and environmental quality. Offering a true breath of fresh air, the district serves as a natural haven, with air purity up to 40 times higher than the downtown core. Framed by mountains to the east, north, and west, the district's diverse landscape centers around the spectacular Miyun Reservoir. Spanning over 180 square kilometers, it is the largest reservoir in North China. Surrounded by lush peaks and breathtaking scenery, it is affectionately known by travelers as "Beijing's sea." When American journalist Edgar Snow visited in August 1960, he famously marveled, "I see new shores on old mountains." This year, Miyun launched its new "Seek Your 'Sea' in Miyun" tourism campaign, highlighting four premier destinations along the reservoir's shores: Sunshine Valley, Yunmeng Mountain, Yunfeng Mountain, and Chateau Yishi.