延长 yáncháng HSK4 extension Origin Definitions Defs Strokes Stroke Words Sentences Sents yáncháng extension · to prolong · to extend · long-lasting 延 yán verbnoun to extend (bound form) to prolong; to stretch out; to extend in distance or time长 長 cháng adjective long long in space or time; lastingyáncháng Yanchang 延 yán Yan Yan, a Chinese surname长 長 cháng surname a Chinese surname