This study proposes to observe high-elevation aerosol at the Mountain Lulin (2,862 mregional/transboundary) atmospheric background station for the next year. The observation scopeincludes physical and chemical characteristics of atmospheric aerosols during the background and event(influenced by long-range transport pollution) periods. In addition, this study will collaborate withgeneral project to participate in 2017 post-7-SEAS international activities including the construction oflong-term monitoring network and regional collaboration in Southeast Asia and collaborations ofNortheast Asia (Japan, Korea, Taiwan, Hong Kong) scientists on the observation of pollution outflowfrom Asian Continent. Daily aerosol chemical properties will be observed from manually collectedaerosols at both Mountain Lulin and Bamboo sites for the international collaboration campaign.The detailed observation items contain aerosol properties such as mass concentration, water-solubleinorganic ions, carbonaceous content, water-soluble organic carbon, humic like substance,anhydrosugars, and aerosol water content in this study. Simultaneous measurements of trace gases,aerosol physical properties, and meteorological factors at the Mountain Lulin site will also beincorporated into data analysis. The observation results will contrast the differences of mountain aerosolcharacteristics between event (biomass burning transport, cloud/fog occurrence, and Asian haze outflow)and non-event (regional background) periods. In addition to the resolved bulk phase aerosol chemicalproperties, the combination of particle-into-liquid ion chromatograph (PILS-IC) and the in-situ watercontent analyzer assembled in previous years with on-site scanning aerosol mobility sizer will facilitatethis study to evaluate the integrated short-interval relationship among aerosol water content, aerosol sizespectra, and water-soluble inorganic ions. The short time-interval aerosol characteristics can alsoprovide a basis for examining aerosol dynamic characteristics between event and non-event periods, andthat from various air mass trajectories during the study periods.In summary, this study will continue to utilize the acquired comprehensive data to investigateaerosol characteristics of background air in the East Asia, transported BB air masses, and pre- andpost-cloud event at Mountain Lulin. The observed data combining with previous findings can furtherprovide long-term aerosol chemical characteristics for modelers to assess aerosol-cloud-radiationinteraction in the East Asia.