Ruili (simplified Chinese: 瑞丽; traditional Chinese: 瑞麗; pinyin: Ruìlì; Tai Nüa: ᥛᥫᥒᥰ ᥛᥣᥝᥰ; Shan: မိူင်းမၢဝ်း; Thai: เมืองมาว; Burmese: ရွှေလီ) is a county-level city of Dehong Prefecture, in the west of Yunnan province, China. It is a major border crossing between China and Myanmar, with the town of Muse located across the border.