Located in Huairou County about 45 miles from Beijing, Mutianyu Great Wall enjoys a long history and is part of the glorious culture of China. It connects Juyongguan Pass in the west and Gubeikou Great Wall in the east. The wall was first built in Northern Qi Dynasty (550 - 557). In Ming Dynasty (1368 - 1644), Tan Lun and Qi Jiguang, two famous patriotic generals, rebuilt it in order to strengthen its defensive potential when they guarded the strategic pass. It served as the northern protective screen, guarding the capital and imperial mausoleums for generations.