On Jan 21_ 31st of 2018, three group members, Prof. Jun Li, Dr. Guangcai Zhong and Dr. Shizhen Zhao visited Dr. Parakrama Karunaratne from University of Peradeniya, Sri Lanka. This designed sampling campaign mainly focuses on the current air pollution and historical environmental change in Chronic Kidney Disease of unknown etiology (CKDu) region, which has been key human health issue for more than two decades in Sri Lanka. Many thanks to the strong support from Dr. Parakrama Karunaratne and his excellent team, 65 passive air samplers were installed in Polonnaruwa region with high, medium and low CKDu prevalence. Meanwhile, six sediment cores were sampled in three Ancient Water Tanks (AWTs). Future collaboration plan was also in-depth discussed. We look forward to productive output from this sampling campaign and more intensive cooperation in future. This work is part of our on-going project, Southern Contaminants Programme (SCP, 2017-2019), which is based on international collaboration and funded by Chinese Academy of Sciences (CAS) as part of its Belt & Road Initiatives.