Our quest for excellence has been constant since 2009. Hangsen lab has been dedicated to the revolutionary electronic cigarette industry since its emergence. Hangsen lab invented the first PG/VG e-liquid and created the RY4 flavour, which is one of the best-selling flavours in the world. After 10 years of experience, Hangsen has obtained profound expertise of craftiness to create the treasures in taste, that is popular across millions of consumers and offering excellence with every bottle, in more than 85 countries.