鼻唇沟 Traditional form: 鼻唇溝 Pinyin (reading): bíchúngōu Definitions: nasolabial fold smile lines laugh lines Characters: 鼻 - nose; first 唇 - lips 沟 - ditch, drain, gutter, narrow waterway Traditional characters: 鼻 - nose; first 唇 - lips 溝 - ditch, drain, gutter, narrow waterway