The first one of ICES meetings was held in 2012 in beautiful Porquerolles Island, France. At that time, we had only four topics: SERS/TERS, MEF/TEF, SEIRS/TEIRS and applications. Later on, three ICES conferences had been held successfully, including ICES2015 in Italy, ICES2017 in Germany, and ICES2019 in Canada. ICES has witnessed the expansion of the field, whose topics further include ultrafast phenomena in plasmon enhanced spectroscopy, advanced materials for surface enhanced spectroscopy, biosensing applications, theory of enhanced optical near-field, etc. Now, ICES event serves as one of the most important international events in the field of enhanced spectroscopy, gathering participants from all over the world.