New particles can affect the climate only if they grow over 50 nm which is the critical size tobe acted as cloud condensation nuclei (CCN). In this study, new particles bursts were investigated during 8March and 23 April, 2011 using a Fast Mobility Particle Sizer (FMPS) in the coastal environment of HongKong. Particle burst events lasting over 1 hour were studied and the total of eight events was observed in 47sampling days. In five days, the median particle diameter (Dpg, i) of nucleated particles did not grow over 50nm in the end. The averaged formation rates and growth rates were 4. 2±3. 5 particles cm-3 s-1 and 4. 1±1. 6 nmh-1 respectively. SO42-, NO3- and NH4+ slightly increased during the particle burst events. In two events, two stages of particle growth were observed in daytime and nighttime, respectively. A sharp increase of NO3-, NH4+ and SO42- was observed when the particles grew from 40 nm to 100 nm with the growth rate of 6. 8 nmh-1. However, there was no evident variation of NO3-, NH4+ and SO42- in concentration when the nucleated particles grew from <10 nm to 40 nm in the same day. In the remaining event, new particles apparently grew from 40 nm to 90 nm in one hour. The growth rate was impractical and detailed analysis of real-time concentrations of NO3-, NH4+ and SO42- further suggested that the apparent growth mostly liked a mixing process rather than a real particle growth. There was one new particle formation event burst in the morning and enhanced in the afternoon, but without "banana shape" growth. Overall, new particles can grew from nucleation mode to CCN size only in one day out of the 47 days.